EP0778599A2 - Interrupteur avec un mécanisme de commutation sensible à la température - Google Patents

Interrupteur avec un mécanisme de commutation sensible à la température Download PDF

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Publication number
EP0778599A2
EP0778599A2 EP96118727A EP96118727A EP0778599A2 EP 0778599 A2 EP0778599 A2 EP 0778599A2 EP 96118727 A EP96118727 A EP 96118727A EP 96118727 A EP96118727 A EP 96118727A EP 0778599 A2 EP0778599 A2 EP 0778599A2
Authority
EP
European Patent Office
Prior art keywords
contact
housing
switch according
switch
counter
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
EP96118727A
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German (de)
English (en)
Other versions
EP0778599A3 (fr
EP0778599B1 (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
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0778599A2 publication Critical patent/EP0778599A2/fr
Publication of EP0778599A3 publication Critical patent/EP0778599A3/fr
Application granted granted Critical
Publication of EP0778599B1 publication Critical patent/EP0778599B1/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 a switch with a housing which has a lower part as the first housing part and an upper part which closes the lower part as the second housing part, and with a temperature-dependent switching mechanism inserted in the lower part, for which a first mating contact and on an inner bottom of the upper part a second mating contact is provided on an inner bottom of the lower part, the switching mechanism depending on its temperature producing an electrically conductive connection between the two mating contacts, which can be contacted from the outside through the assigned housing part, and at least one housing part being made of insulating material.
  • the housing has a pot-like lower part made of electrically conductive material and a cover part closing the lower part, which is made of insulating material.
  • the switching mechanism is loosely inserted, which comprises a spring washer, which carries a movable contact.
  • the spring washer works against a bimetal washer, which is put over the electrical contact.
  • the spring washer which is supported on the bottom of the lower part, presses the movable contact against a mating contact, which is provided on the inside of the cover and extends outward through the wall of the cover in the manner of a rivet.
  • the spring washer itself is made of electrically conductive material, it ensures a low-resistance, electrically conductive connection between the mating contact on the cover part and the lower part, which is contacted from the outside, below the response temperature of the switching mechanism. If the temperature of the switching mechanism is now increased, the bimetallic disc suddenly snaps and presses the movable contact against the force of the spring washer away from the mating contact of the cover, so that the electrical connection is interrupted.
  • Such switches are generally used for temperature monitoring of electrical devices. As long as the temperature of the electrical device does not exceed a predetermined response temperature, the switch remains closed, which is connected in series with the consumer to be protected for this purpose. If the temperature of the consumer now rises inadmissibly, the bimetallic disc snaps and thus interrupts the current flow to the consumer.
  • the known switch has the disadvantage that its manufacture is relatively complex. This is mainly due to the fact that after the manufacture of the cover part, the mating contact must then be attached to the cover part, at the same time ensuring an electrically conductive connection through the wall of the cover part to the outside. This is done in the manner of a rivet that merges into a head outside the cover, to which strands, crimp connections, etc. must be soldered. This mounting of the mating contact on the cover is usually done manually and is therefore very cost-intensive.
  • connection technology in the known switch is complex, since after its complete final assembly, strands or crimp connections have to be soldered or welded to both the head of the rivet and at a suitable point on the electrically conductive lower part.
  • this connection technology is very cost-intensive, since it is often carried out by hand.
  • Another switch is known from DE 21 21 802 A, in the housing of which a switching mechanism as described above is also arranged.
  • the cover part and the lower part are both pot-shaped and made of electrically conductive material.
  • Crimp connections are integrally formed on both the upper part and the lower part, the crimp connection of the lower part extending outwards through a corresponding notch in the wall of the upper part.
  • An insulating film is arranged between the upper part and the lower part in order to electrically insulate the two housing parts from one another.
  • the switching mechanism now contacts the lower part on the one hand via the spring washer and the cover part on the other hand via the movable contact, so that an electrically conductive connection there is between the two crimp terminals as long as the temperature of the switching mechanism is below the response threshold. If the temperature of the switching mechanism rises, this electrical connection is opened in the manner described above.
  • connection technology in this known switch is very easy to implement, only wires need to be clamped into the crimp connections, its assembly is very complex because of the insulating film to be inserted and can therefore only be carried out manually. This manual final assembly is not only cost-intensive, it also leads to assembly errors and thus to a higher scrap.
  • Another switch with a lower part made of electrically conductive material and a cover part made of insulating material is known from DE 31 22 899 C2.
  • two connecting tongues are cast into the cover part.
  • a first connecting tongue is connected in one piece to a plate-shaped part which sits centrally in the cover part and bears the first mating contact.
  • the other contact tongue together with a transverse contact strip, forms a T-shaped part, the outer ends of which are bent downward around the cover, where, when assembled, they are in contact with the lower part, the inner bottom of which serves as a second counter-contact.
  • a bimetallic switching mechanism is inserted into the metallic lower part, which acts in the manner already described above.
  • the known switch is also of complicated construction, during the final assembly it must be ensured that the bent ends actually come into electrical contact with the lower part.
  • Another disadvantage of this switch is that there are further contact resistances between the lower part and the bent ends of the contact strip, which can corrode in everyday use, which can adversely affect the function of this switch.
  • the temperature-dependent switching mechanism here comprises a bimetallic tongue clamped on one side, which is connected at its clamped end to a first connecting tongue and carries at its free end a movable contact which cooperates with a connecting part inside the switch which is formed in one piece with the second connecting tongue can be.
  • This switch is of a completely different construction than the generic switch, with it e.g. to make completely different demands on the bimetallic tongue, because here the switching mechanism cannot be inserted loosely into the housing, as is the case with the generic switch.
  • the assembly of this switch is difficult on the one hand because of the complicated, correct supply and connection of the bimetallic tongue to the first connecting tongue, and also has other problems which are related to the formation of the housing from PTC material.
  • this object is achieved in the switch mentioned at the outset in that the lower part is made of insulating material and the second mating contact is designed as a flat part which is held in the lower part in a form-fitting manner as an integral support part.
  • the object underlying the invention is completely achieved in this way.
  • the lower part can now e.g. be manufactured as a plastic injection-molded part, the counter contact being overmolded directly during the injection molding process, so that it becomes an integral part of the lower part.
  • the fastening of the mating contact to this housing part is also realized, so that several operations can be saved.
  • the upper part can also be made of insulating material, in which case the first mating contact as an integral support part is also held in a form-fitting manner in the upper part.
  • the second and, if necessary, the first counter contact thus fulfill a double function, so to speak, on the one hand they serve as an electrical contact part and on the other hand as a carrier part on which the entire switch or at least the associated housing part itself is constructed.
  • the potted or overmolded mating contact has an integrally formed, outwardly projecting connection part, which is preferably designed as a clamp, crimp or solder connection.
  • the "assembly" of the mating contact can be carried out integrally in one operation during the manufacture of the housing part in question.
  • the housing part is such a housing part in which the counter contact is arranged on the inside on the bottom, from which a connection part extends through the wall of the housing part to the outside and can be designed as a clamp, crimp or solder connection.
  • the housing part made of insulating material has a connecting channel that passes through a wall and leads under the counter contact, so that an electrically conductive connecting part inserted into the connecting channel from the outside electrically contacts the counter contact, in the connecting channel preferably retaining means are provided for the connecting part.
  • the housing part in question is present after its production with an integral mating contact which can now be contacted by an insertable connecting part through the wall, namely through the connecting channel.
  • This connecting part can be, for example, a stranded wire, a plug contact, a connecting lug, a connecting lug provided with a strand, etc.
  • the holding means which are preferably designed as barbs, this inserted connecting part is held captively, so that a further advantage of the new one Switch is that the contacting or connection technology after its final assembly is very simple. It is only necessary to insert a strand or a similar connecting part into the connection channel of the otherwise fully assembled switch in order to implement the corresponding connection technology.
  • Such switches are often supplied without connections to the corresponding manufacturers of the electrical devices to be protected as semi-finished products, where they are then installed accordingly in the devices and electrically connected to them.
  • the new switch now enables very simple contacting, since the strands that are present on the device in any case merely have to be inserted into the connecting channels, where they latch and contact accordingly.
  • the switching mechanism comprises a movable contact, which is supported by a resilient disk which is supported on the second counter contact and which interacts with the first counter contact.
  • the advantage here is that a loosely inserted bimetal rear derailleur can be used, which aligns itself in the lower part made of insulating material during final assembly, since both the lower part and the resilient disc can be round. This results in a great advantage in the final assembly of the new switch, there is no need to pay particular attention to the angular alignment between the switching mechanism and the lower part.
  • the resilient disk can either be a bimetal snap disk itself or a spring washer that works against the force of a bimetal snap disk, as is known, for example, from EP 0 342 441 A2 mentioned at the outset.
  • the combination of such a temperature-dependent switching mechanism with a lower part made of insulating material, in which the counter contact is cast and can be contacted from the outside results in particular advantages in the manufacture and assembly of the new switch.
  • the mating contact can be fed on a belt, in which case only the lower part is injection molded. Then the self-aligning, loose rear derailleur is then inserted, whereupon the lower part is then closed with the cover part. Since the lower part is made of insulating material, no special measures for insulation from the cover part are required, which can consist of metal or even of insulating material with a cast-in counter contact.
  • the mating contact is a metal ring or a metal disk, wherein it is preferably designed as a stamped sheet metal part in which the connecting part is formed in one piece with the mating contact.
  • disks and rings preferably as stamped sheet metal parts
  • disks and rings are particularly simple and inexpensive to manufacture and easy to cast or overmold, so that the manufacture of the housing part with an integral mating contact arranged therein is very inexpensive and easy to implement.
  • the overall height of counter contacts designed in this way is very low, so that the miniature version preferred in such switches can be retained.
  • the mating contacts can, for example, be strapped to these connecting parts as disks or rings with connecting parts extending therefrom, so that they are successively passed through a corresponding plastic molding machine, where the corresponding housing part is, so to speak, formed around the mating contact.
  • the connecting part then also extends automatically through a side wall of the housing part.
  • both housing parts are made of insulating material and each have a mating contact as an integral carrier part.
  • the advantage here is that the manufacture of both housing parts can be carried out in the simple manner described above, so that the entire manufacture of the new switch is very simplified and inexpensive.
  • the two housing parts made of insulating material can then be glued or welded together, for which purpose e.g. UV light, ultrasound or similar can be used.
  • the connection technology is carried out either via two connecting channels into which the connecting pieces are pushed, or else via two connecting pieces extending outwards through the walls, on which clamping blocks, soldering lugs, crimp connections etc. can be provided.
  • the upper part is made of electrically conductive material
  • the metallic bottom of this housing part serves as a counter contact and a wall of this housing part is flanged such that it encloses and holds the lower part.
  • the advantage here is that a simple deep-drawn metal part can be used as the second housing part, on which the second connection of the new switch is provided.
  • the first connection extends through the wall of the first housing part made of insulating material in the manner already described.
  • Another advantage of such a switch lies in its mechanical stability, which is determined by the other housing part made of metal, which in this respect encloses the housing part made of insulating material.
  • Fig. 1 10 denotes a switch, in the housing 11 of which a conventional temperature-dependent switching mechanism 12 is arranged.
  • the housing 11 comprises a first housing part 14 in the form of a lower part 15 and a second housing part 16 in the form of an upper part 17, the wall 18 of which is flanged at 19 and thus surrounds the lower part 15.
  • the upper part 17 is made of electrically conductive material 21.
  • the upper part 17 acts with its bottom 22 as a fixed counter contact 23 for a movable contact 24, which is arranged on a spring washer 25 of the switching mechanism 12.
  • the spring washer 25 is supported on the bottom 26 of the lower part 15, where a further mating contact 27 is arranged in the form of a flat part.
  • a bimetallic disc 28 is placed over the movable contact 24 in a known manner, which in the position shown in FIG. 1 assumes a temperature below its response threshold.
  • the lower counter-contact 27 is made as a ring 29 made of electrically conductive material and has a center hole 30 through which the movable contact 24 comes into contact with the bottom 26 of the lower part 15, which comes from Insulating material 31 is made.
  • a connecting part 32 is formed in one piece with the ring 29 and extends laterally through a wall 33 of the lower part 15 to the outside and is available there for contacting.
  • Ring 29 and connecting part 32 are formed as stamped sheet metal parts 34, which are cast in the insulating material 31 during the manufacture of the lower part 15 or are encapsulated by the latter, so that the mating contact 27 is positively held as a carrier part and is therefore an integral part of the lower part 15.
  • the switch 10 is so to speak built on the counter contact 27.
  • a further connecting lug 35 is provided, which is correspondingly released from the upper part 17 and bent upwards.
  • a notch 36 can also be seen in the upper part 17, through which the connecting part 32 extends outwards. Both the connecting part 32 and the connecting tab 35 can be designed as a clamp, crimp or solder connection.
  • the upper part 17 is also made from insulating material 31.
  • An electrically conductive washer 38 is arranged on its bottom 37 as counter contact 23, which is connected in one piece to a connecting part 39 and was designed as a stamped sheet metal part 40.
  • the connecting part 39 extends laterally through a wall 41 of the upper part 17 to the outside, where it preferably runs parallel to the connecting part 32.
  • a notch 42 is provided in the wall 41, through which the connecting part 32 extends outwards.
  • the stamped sheet metal part 40 is also an integral part of the second housing part 17, with which it was cast or extrusion-coated during its manufacture.
  • the counter contact 23 is a disk 38, so that contact can be made in its central region with the movable contact 24 when it is in contact with the disk 38.
  • the two mating contacts 23 and 27 can also have geometrically other suitable shapes.
  • the mating contacts it is possible for the mating contacts to be formed as strips which are cast in the corresponding housing parts.
  • an abutment is also indicated at 43, which extends radially inward so far that the edge of the bimetallic disc 28 comes into contact with this abutment when it jumps from the low-temperature position shown to its high-temperature position.
  • This abutment isolates the bimetallic snap disk 28 and thus also the spring washer 25 from the first mating contact 23, so that the second mating contact 27 can also be designed as a disk in this embodiment.
  • the abutment 43 is not a circumferential shoulder but only comprises a few circumferentially distributed "blocks" which enable the switching mechanism 12 to be inserted into the lower part 17 by overpressing the tension that occurs on the resilient discs.
  • FIG 3 shows a further housing part 14, 16 which can be used in the switches from FIGS. 1 and 2.
  • This housing part 14, 16 is also made of insulating material 31, but has a connection channel 44 which leads laterally through the wall 33 under the counter contact 27, which is a ring 29 in the exemplary embodiment shown.
  • Retaining means 45 in the form of barbs 46 are provided in the connecting channel 44, which hold an inserted connecting part 47 captively.
  • connection part 47 can be, for example, a stranded wire, a connecting lug, a crimp connection or a stranded crimp connection, which after the switch 10 has been completely assembled only has to be inserted from the outside in order to accomplish the connection technology.
  • a switch 10 as shown in FIG. 2 with two housing parts, as shown in FIG. 3.
  • the two housing parts 14, 16 are glued or welded to one another in a suitable manner, for which purpose UV light or ultrasound can be used.

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Thermally Actuated Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Manufacture Of Switches (AREA)
EP96118727A 1995-12-09 1996-11-22 Interrupteur avec un mécanisme de commutation sensible à la température Expired - Lifetime EP0778599B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19546005A DE19546005C2 (de) 1995-12-09 1995-12-09 Schalter mit einem temperaturabhängigen Schaltwerk
DE19546005 1995-12-09

Publications (3)

Publication Number Publication Date
EP0778599A2 true EP0778599A2 (fr) 1997-06-11
EP0778599A3 EP0778599A3 (fr) 1998-05-27
EP0778599B1 EP0778599B1 (fr) 2001-05-23

Family

ID=7779672

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96118727A Expired - Lifetime EP0778599B1 (fr) 1995-12-09 1996-11-22 Interrupteur avec un mécanisme de commutation sensible à la température

Country Status (6)

Country Link
US (1) US5867084A (fr)
EP (1) EP0778599B1 (fr)
AT (1) ATE201530T1 (fr)
DE (2) DE19546005C2 (fr)
ES (1) ES2158214T3 (fr)
PT (1) PT778599E (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0858090A2 (fr) * 1997-02-11 1998-08-12 Thermik Gerätebau GmbH Thermostat avec un dispositif interrupteur à bimétal

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4312350B2 (ja) * 2000-06-06 2009-08-12 ウチヤ・サーモスタット株式会社 サーマルプロテクタ
CN1428806A (zh) * 2001-12-07 2003-07-09 古河电气工业株式会社 热保护器
JP3996400B2 (ja) * 2002-01-11 2007-10-24 株式会社東海理化電機製作所 電気導通機能を有する弾性シート構造及びプリント回路基板構造
DE102004036117B4 (de) * 2004-07-24 2006-12-14 Tmc Sensortechnik Gmbh Thermobimetallschalter
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
JP5300840B2 (ja) * 2008-04-18 2013-09-25 タイコエレクトロニクスジャパン合同会社 回路保護デバイス
CN104011823B (zh) * 2011-10-20 2017-05-24 泰科电子日本合同会社 保护装置
DE102011119632B3 (de) * 2011-11-22 2013-04-11 Marcel P. HOFSAESS Temperaturabhängiges Schaltwerk
CN105308710B (zh) * 2013-04-19 2018-08-07 泰科电子日本合同会社 保护装置
JPWO2015029826A1 (ja) * 2013-08-26 2017-03-02 Ｌｉｔｔｅｌｆｕｓｅジャパン合同会社 保護装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2121802A1 (de) 1971-05-03 1973-01-25 Thermik Geraetebau Gmbh Temperaturwaechter
DE3122899C2 (de) 1981-06-10 1984-10-11 Peter 7530 Pforzheim Hofsäss Temperaturschalter
EP0342441A2 (fr) 1988-05-20 1989-11-23 Erbengemeinschaft Peter Hofsäss: Hofsäss, U. Hofsäss, M.P. Hofsäss, D.P. Hofsäss, H.P. Hofsäss, C.R. Hofsäss, B.M. Dispositif de commutation sensible à la température
WO1994019815A1 (fr) 1993-02-18 1994-09-01 Otter Controls Limited Ameliorations concernant des commutateurs electriques

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2917557C2 (de) * 1979-04-30 1983-12-08 Peter 7530 Pforzheim Hofsäss Wärmeschutzschalter
DE3710672C2 (de) * 1987-03-31 1997-05-15 Hofsaes Geb Zeitz Ulrika Temperaturwächter mit einem Gehäuse
EP0313674B1 (fr) * 1987-10-27 1993-01-20 Temtech-Temperatur-Technik Hans Peter Bojer Thermo-rupteur bimétallique
GB9109316D0 (en) * 1991-04-30 1991-06-19 Otter Controls Ltd Improvements relating to electric switches

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2121802A1 (de) 1971-05-03 1973-01-25 Thermik Geraetebau Gmbh Temperaturwaechter
DE3122899C2 (de) 1981-06-10 1984-10-11 Peter 7530 Pforzheim Hofsäss Temperaturschalter
EP0342441A2 (fr) 1988-05-20 1989-11-23 Erbengemeinschaft Peter Hofsäss: Hofsäss, U. Hofsäss, M.P. Hofsäss, D.P. Hofsäss, H.P. Hofsäss, C.R. Hofsäss, B.M. Dispositif de commutation sensible à la température
WO1994019815A1 (fr) 1993-02-18 1994-09-01 Otter Controls Limited Ameliorations concernant des commutateurs electriques

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0858090A2 (fr) * 1997-02-11 1998-08-12 Thermik Gerätebau GmbH Thermostat avec un dispositif interrupteur à bimétal
EP0858090A3 (fr) * 1997-02-11 1999-05-26 Thermik Gerätebau GmbH Thermostat avec un dispositif interrupteur à bimétal
US6064295A (en) * 1997-02-11 2000-05-16 Thermik Geratebau Gmbh Temperature-dependent switch having a bimetallic switching mechanism

Also Published As

Publication number Publication date
ES2158214T3 (es) 2001-09-01
ATE201530T1 (de) 2001-06-15
US5867084A (en) 1999-02-02
PT778599E (pt) 2001-09-28
DE19546005A1 (de) 1997-06-12
EP0778599A3 (fr) 1998-05-27
DE19546005C2 (de) 1999-07-08
DE59606949D1 (de) 2001-06-28
EP0778599B1 (fr) 2001-05-23

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