EP0048302B1 - Interrupteur à action brusque et procédé pour sa fabrication - Google Patents

Interrupteur à action brusque et procédé pour sa fabrication Download PDF

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Publication number
EP0048302B1
EP0048302B1 EP80105744A EP80105744A EP0048302B1 EP 0048302 B1 EP0048302 B1 EP 0048302B1 EP 80105744 A EP80105744 A EP 80105744A EP 80105744 A EP80105744 A EP 80105744A EP 0048302 B1 EP0048302 B1 EP 0048302B1
Authority
EP
European Patent Office
Prior art keywords
spring
snap
guide
switch
lever
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
Application number
EP80105744A
Other languages
German (de)
English (en)
Other versions
EP0048302A1 (fr
Inventor
Helmut Dr. Dipl.-Phys. Baader
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.)
Elektromanufaktur Zangenstein Hanauer GmbH and Co KGaA
Original Assignee
Elektromanufaktur Zangenstein Hanauer GmbH and Co KGaA
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 to DE19792937309 priority Critical patent/DE2937309A1/de
Application filed by Elektromanufaktur Zangenstein Hanauer GmbH and Co KGaA filed Critical Elektromanufaktur Zangenstein Hanauer GmbH and Co KGaA
Priority to EP80105744A priority patent/EP0048302B1/fr
Priority to AT80105744T priority patent/ATE10885T1/de
Priority to US06/214,949 priority patent/US4365123A/en
Publication of EP0048302A1 publication Critical patent/EP0048302A1/fr
Application granted granted Critical
Publication of EP0048302B1 publication Critical patent/EP0048302B1/fr
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
    • H01H5/04—Energy stored by deformation of elastic members
    • H01H5/18—Energy stored by deformation of elastic members by flexing of blade springs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches

Definitions

  • Snap-action switches are often used in electrical engineering to ensure that switchovers of electrical contacts occur abruptly as soon as an input variable, which can be changed as desired, has reached a certain critical value. Sudden switchovers are necessary in order to achieve reliable contact making and to avoid contact fires. Frequently, for example in the case of diaphragm pressure switches, the input variable is a force which has to be overcome by an adjustable bias in order to cause the snap switch to be switched over.
  • the bias spring is a helical compression spring which is supported on the one hand on an adjusting screw and on the other hand presses directly against the handlebar.
  • the handlebar is mounted on a physically trained axle, which is arranged in a stationary manner in such a way that the handlebar transmits forces required for switching only to the snap spring, but relieves it of transverse forces. This applies both to shear force components of the actuating force acting on the handlebar and to shear force components that can be transmitted from the biasing spring to the handlebar.
  • a non-rotating intermediate layer is arranged, which is to prevent the adjusting screw, when it is turned to adjust the snap switch, from rotating the helical compression spring and building up a torsional tension in it, which is initially retained by static friction, but sooner or later later released due to vibrations of the snap switch, whereby the preload acting on the handlebars would thus change the entire switching characteristic of the snap switch by an amount not fixed.
  • the invention is therefore based on the design of a snap switch of the type described with egg niche simple means in such a way that the original adjustment represents the size of the critical input force required for switching over practically limited time with high accuracy E.
  • the biasing spring is a BI, which is attached on the one hand to the handlebar and another a lever which is in the Ni spring carrier in a fixed bearing and is adjustable by means of the adjusting member.
  • the biasing spring also serves as a mounting for the handlebar, which keeps it free of external friction.
  • the inner F within a leaf spring of the type and size included here is negligible.
  • the fact that the or each Vo spring is attached to the handlebar on the one hand and on the lever according to the invention on the other hand in order to be able to transmit bending moments from the lever to the handlebar, a displacement between the biasing spring and the components between which it is clamped is excluded during operation, so that the original set Preload nothing can be lost afterwards. Losses of spring tension due to fatigue can be ruled out at least as well by suitable dimensioning of the biasing spring in the snap switch according to the invention as in known snap switches of the generic type.
  • a snap-action switch is created by the invention, which maintains its original setting considerably more precisely and also considerably more reliably when manufactured in large series than known snap-action switches of the generic type.
  • the snap switch according to the invention is also largely insensitive to corrosion, because its working accuracy is unaffected by bearing friction. The friction in the bearing of the lever is irrelevant to the working accuracy of the snap switch, since it only occurs during adjustment and the lever is no longer moved later.
  • a rotatable cam or a wedge slide could be used as the setting element.
  • an adjusting element in the form of a screw as is provided as a component, albeit in a different arrangement, in the known snap switch described.
  • the handlebar and adjusting lever are connected to one another by a pair of leaf springs which are arranged on both sides of the snap spring. This results in a particularly precise and particularly resistant to lateral forces bearing of the handlebar.
  • This embodiment is preferably further developed in that the leaf springs are welded to flanges which project laterally from the cross-sectionally U-shaped link and the correspondingly designed lever, and in that the snap spring is arranged within these U-shaped cross sections.
  • the snap switch according to the invention can be produced according to a further feature of the invention in that the handlebar is punched together with the lever over a bridge, then the leaf spring or leaf springs are welded to the handlebar and lever and the like then the bridge is removed. Dadurc the A in the punch between the handlebar and lever unchanged, and this distance also has the bending characteristics of the leaf spring leaf springs, whereby it depends on a precise arrangement of the welded joint between each leaf spring and the one hand and the lever on the other.
  • the electrically conductive component snap switch 10 includes a Sc spring 12 in the form of a rectangular spring with two parallel longitudinal slots a pair of outer legs 16 such that they are mite only at their two ends and are connected to a central part of the Schna 12.
  • the two longitudinal slots 14 are connected to the interruption approximately in the middle so that there is an overall recess.
  • the two separated by the interruptions mean Sche of the snap spring 12 are clamped between a plate 22 and a spring support 24, d made of metal, and rr welded such that the total of two middle legs 18 and interruption 20 bridging Abs of the cover plate 22 and the Federträ is greater than the length of each of the two Legs 16.
  • the two middle legs 18 cannot lie in a common plane with the outer legs 16, but either form a serpentine line curved upward, then downward and finally upward with respect to the outer legs 16 (FIG. 2 and 4) or a curved upward with respect to the two outer legs 16 (Fig. 3 and 5).
  • the snap spring 12 attached to the spring support 24 is thus bistable; it can only jump back and forth under the action of an external force between a first switching position (FIGS. 2 and 4) and a second switching position (FIGS. 3 and 5).
  • the spring support 24 is fastened to the base 4 of the housing 2 and has a soldering tab 26 which projects through it to the outside.
  • Further electrically conductive components of the snap switch 10 are two stationary contacts 28 and 30, which are attached to a contact carrier 34 and 36, respectively, opposite one another on both sides of a double-sided switching contact 32 attached to the snap spring 12.
  • the contact carriers 34 and 36 are fastened to the base 4 and each also have a soldering lug 38 and 40, respectively, which projects through the base.
  • the snap switch 10 connects the solder tabs 26 and 38 to one another when the snap spring 12 assumes its first switching position according to FIGS. 2 and 4, whereas the solder tabs 26 and 40 are connected to one another when the snap spring 12 has its second, in the drawings assume the lower switching position according to FIGS. 3 and 5.
  • the snap spring 12 shown here corresponds to that according to DE-A1-28 19 795; it also shows further examples of snap springs which, in addition to other known snap springs, are suitable for the present snap switch 10.
  • a bearing block 42 is arranged on each side of the spring support 24, which is formed in one piece with the housing 2 and has an articulated socket 44.
  • the joint sockets 44 receive two joint heads 46, which are each formed on a hook-like part 48 of a lever 50.
  • the lever 50 can be pivoted about a fixed axis A, which extends through the center points of the two joint sockets 44.
  • the lever 50 engages with its two hook-like parts 48 the spring support 24 with ample play, so that it can be pivoted about the axis A in a wide angular range.
  • an adjusting member 52 in the form of a cap screw is provided, which engages at the end of the lever 50 remote from the axis A and is screwed into the housing base 4.
  • the two leaf springs 56 are welded to j 'to the axis A is also parallel Flar a handlebar 60 and together form a bearing for the pivoting of this Ler the errr to A but no other movement, the axis A is also Querstoffl snap spring 12th
  • a hook 60 ausc On the handlebar 60 is a hook 60 ausc on which the one, remote from the switching contact from the lever 50 end of the spring 12 is attached.
  • the end 64 of the handlebar 60 remote from the lever itself forms a recess 66 in the housing 2 whose upper and lower limit j stop for the handlebar 60.
  • the hook 62 and the end 64 arr 60 is finally formed a conical attack 68 for an arm 70 of an actuation.
  • the end of the handlebar 60 is in the rest position of the S switch 10 with a more or large bias on the upper beg of the recess 66 (Fig. 2 and 4; however, the arm 70 exerts a downward force P in the drawings which exceeds a certain amount corresponding to the tension, then this force pushes the 60 into its lower stop position (FIG. 5) and on the way Spri snap spring 12 abruptly so that switching contact 32, which originally applied to the stationary contact 28, suddenly detaches from it and contacts the stationary contact 30.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Manufacture Of Switches (AREA)
  • Push-Button Switches (AREA)

Claims (4)

1. Commutateur à action brusque (10) comprenant un ressort d'action brusque (12) qui est fixé à un support de ressort (24) et porte au moins un contact mobile à une certaine distance de ce dernier; au moins un contact (28, 30) fixe par rapport au support de ressort (24), contre lequel le contact mobile (32) est appliqué dans une position de commutation du ressort d'action brusque (12), un bras oscillant (60) qui s'articule dans le voisinage du support de ressort (24) et est relié au ressort d'action brusque (12) à une certaine distance de sa portée d'articulation ainsi que du contact mobile (32), et présente un point d'application (68) pour une force d'actionnement (P); au moins un ressort de précontrainte qui agit sur le bras oscillant (60) et tend à maintenir ce dernier avec précontrainte dans une position de butée, et un organe de réglage (52) au moyen duquel on peut régler la précontrainte du ress précontrainte, caractérisé en ce que le de précontrainte est un ressort lame (56) fixé, d'une part, au bras oscillant (60) et, part, à un levier (50) qui est monté dar portée d'articulation fixe (44) dans le voi du support de ressort (24) et peut être
Figure imgb0002
position angulaire au moyen de l'orga réglage (52).
2. Commutateur à action brusque sE revendication 1, caractérisé en ce que 1 oscillant (60) et le levier (50) sont réunis l'autre par une paire de ressorts lames (E sont disposés de part et d'autre du d'action brusque (12).
3. Commutateur à action brusque
Figure imgb0003
revendication 2, caractérisé en ce qi ressorts lames (56) sont soudés à des (54, 58) qui font saillie latéralement sur oscillant (60), présentant une forme de section, et sur le levier (50) qui est d figuration correspondante et en ce c ressort d'action brusque (12) est disposé térieur de ces sections en forme de U.
4. Procédé de fabrication d'un
Figure imgb0004
à action brusque selon l'une des revendic 1 à 3, dans lequel le bras oscillant (6 découpé dans de la tôle, caractérisé en le bras oscillant (60) est découpé en r réuni au levier (50) par un pontet e ensuite, on soude le ressort lame ou les
Figure imgb0005
lames (56) au bras oscillant (60) et au (50) et qu'on n'élimine le potent qu'aprè opération.
EP80105744A 1979-09-14 1980-09-24 Interrupteur à action brusque et procédé pour sa fabrication Expired EP0048302B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE19792937309 DE2937309A1 (de) 1979-09-14 1979-09-14 Schnappschalter sowie verfahren zu dessen herstellung
EP80105744A EP0048302B1 (fr) 1979-09-14 1980-09-24 Interrupteur à action brusque et procédé pour sa fabrication
AT80105744T ATE10885T1 (de) 1979-09-14 1980-09-24 Schnappschalter sowie verfahren zu dessen herstellung.
US06/214,949 US4365123A (en) 1979-09-14 1980-12-10 Snap switch as well as a method for its manufacture

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19792937309 DE2937309A1 (de) 1979-09-14 1979-09-14 Schnappschalter sowie verfahren zu dessen herstellung
EP80105744A EP0048302B1 (fr) 1979-09-14 1980-09-24 Interrupteur à action brusque et procédé pour sa fabrication
US06/214,949 US4365123A (en) 1979-09-14 1980-12-10 Snap switch as well as a method for its manufacture

Publications (2)

Publication Number Publication Date
EP0048302A1 EP0048302A1 (fr) 1982-03-31
EP0048302B1 true EP0048302B1 (fr) 1984-12-19

Family

ID=27188205

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80105744A Expired EP0048302B1 (fr) 1979-09-14 1980-09-24 Interrupteur à action brusque et procédé pour sa fabrication

Country Status (4)

Country Link
US (1) US4365123A (fr)
EP (1) EP0048302B1 (fr)
AT (1) ATE10885T1 (fr)
DE (1) DE2937309A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3623200A1 (de) * 1986-07-10 1988-01-14 Schaltbau Gmbh Schnappschalter
US5079806A (en) * 1990-08-01 1992-01-14 Lasso L. P. Pivotal colsure
ATE333141T1 (de) 2004-02-24 2006-08-15 Electrovac Temperaturfühler
EP1630837B1 (fr) 2004-08-23 2007-01-17 Siemens Aktiengesellschaft Système de contact

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2374986A (en) * 1943-02-23 1945-05-01 First Ind Corp Electric switch construction
DE1939186U (de) * 1966-02-15 1966-05-26 Patinvest Patent Und Invest A Schnappschalter, insbesondere fuer waschmaschinen od. dgl.
EP0026449A1 (fr) * 1979-09-26 1981-04-08 Elektromanufaktur Zangenstein Hanauer GmbH & Co Interrupteur multiple actionné par pression

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE505847A (fr) * 1950-09-16
DE1075705B (de) * 1953-06-22 1960-02-18 Haydon Switch, Incorporated, Waterbury Conn (V. St A) Schnappschalter
US3662132A (en) * 1970-01-26 1972-05-09 Robertshaw Controls Co Electrical switch construction
US4050046A (en) * 1976-05-19 1977-09-20 Cutler-Hammer, Inc. Thermostatic switch
US4168412A (en) * 1978-04-19 1979-09-18 Robertshaw Controls Company Electrical switch construction and method of making the same
DE2819795C2 (de) * 1978-05-05 1986-05-15 Elektromanufaktur Zangenstein Hanauer GmbH & Co, 8471 Altendorf Schnappschalter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2374986A (en) * 1943-02-23 1945-05-01 First Ind Corp Electric switch construction
DE1939186U (de) * 1966-02-15 1966-05-26 Patinvest Patent Und Invest A Schnappschalter, insbesondere fuer waschmaschinen od. dgl.
EP0026449A1 (fr) * 1979-09-26 1981-04-08 Elektromanufaktur Zangenstein Hanauer GmbH & Co Interrupteur multiple actionné par pression

Also Published As

Publication number Publication date
US4365123A (en) 1982-12-21
ATE10885T1 (de) 1985-01-15
EP0048302A1 (fr) 1982-03-31
DE2937309A1 (de) 1981-04-02

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