EP1127362B1 - Schnappschalter mit gezwungener kontaktöffnung mit verbesserter montierungstoleranz - Google Patents

Schnappschalter mit gezwungener kontaktöffnung mit verbesserter montierungstoleranz Download PDF

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Publication number
EP1127362B1
EP1127362B1 EP99950836A EP99950836A EP1127362B1 EP 1127362 B1 EP1127362 B1 EP 1127362B1 EP 99950836 A EP99950836 A EP 99950836A EP 99950836 A EP99950836 A EP 99950836A EP 1127362 B1 EP1127362 B1 EP 1127362B1
Authority
EP
European Patent Office
Prior art keywords
springs
switch
moving equipment
conducting element
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
EP99950836A
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English (en)
French (fr)
Other versions
EP1127362A1 (de
Inventor
Christian Thomson-CSF Propr. Intellectuelle ROUX
Jacques Thomson-CSF Propr. Intellectuelle BOJOLY
Christian Thomson-CSF Propr. Intell. MINODIER
Alain Thomson-CSF Propriété Intellectuelle PIGAT
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.)
Crouzet Automatismes SAS
Original Assignee
Crouzet Automatismes SAS
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Filing date
Publication date
Application filed by Crouzet Automatismes SAS filed Critical Crouzet Automatismes SAS
Publication of EP1127362A1 publication Critical patent/EP1127362A1/de
Application granted granted Critical
Publication of EP1127362B1 publication Critical patent/EP1127362B1/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
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H01H13/26—Snap-action arrangements depending upon deformation of elastic members
    • H01H13/28—Snap-action arrangements depending upon deformation of elastic members using compression or extension of coil springs
    • H01H13/285—Snap-action arrangements depending upon deformation of elastic members using compression or extension of coil springs having a symmetrical configuration
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/001—Means for preventing or breaking contact-welding

Definitions

  • the present invention relates to an abrupt break switch.
  • Snap switches are switches in which the power cut occurs abruptly, as opposed to switches in which the separation of the electrical contacts is slow, and depends on the speed of manual action of an operator.
  • the switch the invention is more particularly a limit switch type, for which tolerances of installation and therefore of use are improved.
  • a user is provided with, for a reduced size of a limit switch, a larger tolerance between a positive open position (POP) and an end position racing (PFC). The distance between these two positions can then be better exploited by the user to more easily stop a mobile, or absorb its dispersions after it has passed the POP position.
  • POP positive open position
  • PFC end position racing
  • This positive opening must be capable of detaching the conductive element from the contact pads.
  • the bonding concerned would have been that resulting from a weld by passage a short-circuit current (normalized) of one thousand amperes. This means that the tilting mechanism and the lever are very robust to cause this takeoff. In normal times, of course, such a takeoff is not necessary since the switch will have operated the expected abrupt break.
  • the solution of the invention consists in making exercise the positive opening action, and the deformation of the moving assembly, on the same conductive element, the resting conductive element, the one which found at the front of this mobile equipment.
  • the distance from the positive opening point of the end position will be greater with the invention than in the state of the cited technique.
  • FIGS 1a to 1e show different states of the break switch abrupt of the invention.
  • This switch has in a housing 1 schematically shown, four electrical contact pads 2 to 5. These studs are opposite two by two. In particular, stud 2 is opposite the stud 3 and the pad 4 opposite the pad 5. These contact pads are connected to electrical connections not shown. These electrical connections are intended to convey electrical potentials according to the closed state or open the switch.
  • the pads 2 to 5 have to ensure the contacts of pads such as 6, possibly covered with a layer silver or other material capable of improving contact and not not cause a deposit when creating electric arcs.
  • a mobile assembly 7 This mobile assembly drives on either side of a movement represented by the double arrow 8 conduction elements.
  • a first conduction element before 9 is located opposite an end 10 of a pusher 11 by which is carried out an operation of the switch of the invention.
  • Pusher 11 serves in particular of a limit switch type.
  • a conduction element rear 12 is placed together in the moving assembly, on the other side of this with respect to the front conduction element 9. Elements 9 and 12 are used to establish electrical connections between pads 4 and 5 and 2 and 3 respectively.
  • a set of two compression springs 13 and 14 is supported by a on the moving part 7 and on the other hand on another end 15 of the pusher 11.
  • the springs 13 and 14 are in compression. They are oriented like the two sides of an isosceles triangle whose height would be in the direction of pusher 11.
  • the switch also has a rocker control which will studied further on examining Figure 3 but whose effect can be symbolized by the action of a stop 16 on the front conduction element 9.
  • the rocker control is such that the stop 16 moves in the direction of element 9 when the pusher 11 enters the housing 1. The penetration of the pusher 11 is effected by pushing on this pusher.
  • the mobile assembly also includes a housing 17 for receiving a set of compensating springs18 and 19.
  • the moving assembly 7 comprises for this housing 17 a cavity 20 surmounted by the element of conduction before 9.
  • the element 9 is held in the cavity 20 by the springs 18 and 19 on the one hand, which press on this element 9 and on the bottoms 21 and 22 of the cavity, and by the presence on the other hand of overflows 23 and 24.
  • the overflows 23 and 24 overflow from the top of the cavity 20 and retain element 9.
  • the housing 17 made in the cavity 20 is located on the side of the front conductive element 9 and not, as in the prior art, on the side of the conductive element rear 12.
  • FIG. 1a shows a deviation E, called small run or approach run, corresponding to the sinking of the push-button from position PRP to position PA-.
  • This deviation E in terms of practical is generally of the order of 2 mm. It is necessary for the good operation of the limit switch during its service life (differential travel, tolerances, internal wear ).
  • the springs 13 and 14 tend to call the push button 11 towards the front element 9. Or a stronger complementary spring that the resultant of the springs 13 and 14 and exerting a force in direction contrary, and not shown, then takes support on the housing 1 and on the push button 11 to bring it out. Or, in the PA + position, the springs 13 and 14 are at rest. To make the switch reversible, the first solution is adopted.
  • FIG 1d we show that if we continue to press the pusher 11, it approaches a so-called POP position in which the stop 16 would come into contact with the conductive element 9 if it had remained stuck on pads 4 and 5. If the switch has operated normally, in the POP position, the stop 16 does not come into contact with the conductive element 9. On the other hand, if the conductive element has remained glued, in the POP position she comes into contact with him. We can also remember for the position POP not the position in which the stop 16 comes into contact with element 9 but rather a position in which the separation of the contact is guaranteed. This position is materialized by the end 25 of the stop 16.
  • the moving element 7 must, to contain the compression springs 13 and 14 in their position corresponding to Figure 1a and in their position corresponding to Figure 1st, have an asymmetrical diamond shape.
  • the asymmetry comes from the advantage of having the PA position closer to the PRP position than the PFC position in all switches. This makes it easier to use.
  • the asymmetrical diamond shape means an imperfect diamond whose a part, here the part located on the side of the front conductive element 9, is closes at a sharper angle than the part closing on the element side conductor 12. Therefore the cavity 20 can have a U shape in which branches of the U can be much deeper than if this cavity had been arranged on the side where the closing angle of the rhombus is more obtuse.
  • the branches of the U embrace the acute angle of the rhombus asymmetrical formed by a cavity 28 of the moving element 7 where move the springs 13 and 14.
  • FIG. 1e it can be seen that the asymmetry results from the steeper inclination of the springs 13 and 14 due to the additional depression of the pusher 11.
  • Figure 1f shows a comparison of what is produced in the state of the art.
  • Figure 2 shows a comparative position of the end 15 in the positions PRP, PA, POP and PFC in the state of the art, in the improvement made in the patent cited above, and according to the invention.
  • the small front race, or approach race is of the order of 2 mm while the total stroke is normally of the order of 5 mm.
  • the stroke guaranteed positive opening residual CRA + is around 0.5 mm.
  • the distance separating the positions PA and POP was previously only related to manufacturing tolerances of switches.
  • the POP position can be approximated to the PA position by about 0.5 mm.
  • the POP position goes be approached 1.5 mm in such a way that from the PA position to the new POP position remains only a deviation of about 1 mm.
  • Figure 3 shows on the pusher 11, the end 10, the end 15 which drives the springs 13 and 14 as well as an operating end 29 which operates the stop 16.
  • the stop 16 also called a pallet, has essentially an axis of rotation 30 here perpendicular to the plane of the figure 3 and to the elongated direction of the pusher 11.
  • the end 29 presses by a support point 31 on the pallet 16, This support is exerted with a maneuvering radius 32.
  • one end 33 of the pallet comes into contact with the element front conductor 9 (if glued).
  • the operating range of the end 33 is the radius 34 whose value is, at the beginning, greater than the radius 32. Under these conditions for a slight advance of the end 29, there will have a large projection from the end 33.
  • the pallet 16 has tilted towards the end of the pushed.
  • the end 33 has a useful radius of thrust on element 9 of value less than that of radius 34.
  • By opposition radius 32 increases. This means that towards the end of the stroke, the overtravel 26 of the pusher 11 will be greater than the overtravel 27 of the front conductive element 9.
  • FIG. 3 also shows part of the housing 1 and, schematically, a complementary compressed spring 35 tending to make bring out push-button 11.
  • the PRP-PFC distance corresponds in practice to spring travel 35.
  • the invention therefore ultimately results in the fact that the overtravel 27 may be larger than in the prior art, thanks to the asymmetry mainly, of course the overtravel 26 will be also, larger. Furthermore as indicated above the point POP positive opening will be brought very close to the PA action point.
  • the invention then has the advantage, for the user, of a greater CRA + guaranteed positive opening overtravel, without increase of the size of the limit switch.

Landscapes

  • Push-Button Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Keying Circuit Devices (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Claims (3)

  1. Schnell auslösender Schalter
    mit einem Gehäuse (1), das vier paarweise einander gegenüberliegende Klemmen (2, 3, 4, 5) elektrischer Kontakte aufweist,
    mit einem beweglichen Organ (7) in diesem Gehäuse, wobei dieses Organ ein hinteres Schaltelement (12) und ein vorderes Schaltelement (9) durch seine Bewegung (8) hin- und herbewegt und wobei diese Schaltelemente abwechselnd mit zwei ersten (2, 3) beziehungsweise zwei zweiten einander gegenüberliegenden Klemmen (4, 5) in Kontakt gelangen,
    mit einem Satz von Kompressionsfedern (13, 14), die sich auf dem beweglichen Organ und auf einem Ende (15) einer Taste (11) zur Betätigung des Schalters abstützen,
    mit einer Kippsteuerung (16), die mechanisch mit der Taste verbunden ist und eine positive Kraft auf das vordere Schaltelement ausüben kann, wenn die Taste niedergedrückt wird,
    mit einem Satz von Kompensationsfedern (18, 19), die zwischen dem beweglichen Organ und einem Schaltelement liegen,
    und mit einem Platz (17) in einer Ebene des beweglichen Organs, um die Kompensationsfedern aufzunehmen,
    dadurch gekennzeichnet, daß dieser Platz sich auf der Seite des vorderen Schaltelements (9) befindet.
  2. Schalter nach Anspruch 1, dadurch gekennzeichnet, daß die Kompensationsfedern eine größere Kraft auf das vordere Schaltelement ausüben als die Resultierende einer von den Kompressionsfedern erzeugten Kompressionskraft in Richtung des Drucks auf die Taste.
  3. Schalter nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, daß das bewegliche Organ einen Raum in Form einer unsymmetrischen Raute enthält, um die Kompressionsfedern aufzunehmen, wobei der Platz für die Kompensationsfedern auf der Seite des spitzeren Winkels dieser unsymmetrischen Raute liegt.
EP99950836A 1998-11-03 1999-10-26 Schnappschalter mit gezwungener kontaktöffnung mit verbesserter montierungstoleranz Expired - Lifetime EP1127362B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9813810 1998-11-03
FR9813810A FR2785441B1 (fr) 1998-11-03 1998-11-03 Interrupteur a rupture brusque et a ouverture forcee avec tolerance de mise en place amelioree
PCT/FR1999/002603 WO2000026929A1 (fr) 1998-11-03 1999-10-26 Interrupteur a rupture brusque et a ouverture forcee avec tolerance de mise en place amelioree

Publications (2)

Publication Number Publication Date
EP1127362A1 EP1127362A1 (de) 2001-08-29
EP1127362B1 true EP1127362B1 (de) 2002-08-07

Family

ID=9532307

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99950836A Expired - Lifetime EP1127362B1 (de) 1998-11-03 1999-10-26 Schnappschalter mit gezwungener kontaktöffnung mit verbesserter montierungstoleranz

Country Status (7)

Country Link
US (1) US6486428B1 (de)
EP (1) EP1127362B1 (de)
JP (1) JP2002529889A (de)
AT (1) ATE222022T1 (de)
DE (1) DE69902484T2 (de)
FR (1) FR2785441B1 (de)
WO (1) WO2000026929A1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2830979B1 (fr) * 2001-10-12 2004-07-16 Soderep Ecans Sa Dispositif de verrouillage mecanique bistable d'un mobile en translation, et coupe-batterie equipe de ce dispositif
US7211758B2 (en) * 2005-07-12 2007-05-01 Defond Components Limited Circuit interrupter that produces snap-action connection and disconnection between electrical contacts
US20080041708A1 (en) * 2006-07-07 2008-02-21 Judco Manufacturing, Inc. Dual mode switch
CN103177884B (zh) * 2011-12-26 2016-09-14 上海电科电器科技有限公司 低压电器的触头结构
CN107039203B (zh) * 2017-06-05 2019-08-02 漳州聚安美电气科技有限公司 一种防止动作死点的开关芯部结构
CN107134380B (zh) * 2017-06-05 2019-08-02 漳州聚安美电气科技有限公司 限位开关芯部结构

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2245634A (en) * 1940-03-27 1941-06-17 John C Yingling Switch mechanism
US2641663A (en) * 1949-07-28 1953-06-09 Cutler Hammer Inc Electric switch
US3270157A (en) * 1964-09-24 1966-08-30 Arrow Hart & Hegeman Electric Snap mechanism for slow-break electric switches
US3624332A (en) * 1970-09-09 1971-11-30 Oak Electro Netics Corp Snap switch
DE3375535D1 (en) * 1983-09-08 1988-03-03 Square D Starkstrom Gmbh Switching device, in particular for limit switches or press button limit switches
FR2575592B1 (fr) * 1984-12-28 1987-02-06 Telemecanique Electrique Appareil interrupteur a equipage mobile equilibre et ouverture forcee
FR2579009B1 (fr) * 1985-03-13 1988-11-10 Telemecanique Electrique Interrupteur electrique a ouverture forcee de ses contacts repos
DE3740360A1 (de) * 1986-12-02 1988-06-16 Square Spa Schalter mit schnelloesung und moeglichkeit zur zwangsoeffnung der kontakte, insbesondere fuer wegbegrenzungseinrichtungen
DE4301213C1 (de) * 1993-01-19 1994-05-19 Preh Elektro Feinmechanik Drucktastenschalter
DE4428285C1 (de) * 1994-08-10 1995-07-06 Preh Elektro Feinmechanik Drucktastenschalter

Also Published As

Publication number Publication date
ATE222022T1 (de) 2002-08-15
WO2000026929A1 (fr) 2000-05-11
FR2785441A1 (fr) 2000-05-05
EP1127362A1 (de) 2001-08-29
US6486428B1 (en) 2002-11-26
JP2002529889A (ja) 2002-09-10
DE69902484T2 (de) 2003-05-22
DE69902484D1 (de) 2002-09-12
FR2785441B1 (fr) 2001-01-26

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