EP0209433B1 - Pièce de support de contacts mobiles, notamment pour appareil interrupteur de protection - Google Patents

Pièce de support de contacts mobiles, notamment pour appareil interrupteur de protection Download PDF

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Publication number
EP0209433B1
EP0209433B1 EP86401394A EP86401394A EP0209433B1 EP 0209433 B1 EP0209433 B1 EP 0209433B1 EP 86401394 A EP86401394 A EP 86401394A EP 86401394 A EP86401394 A EP 86401394A EP 0209433 B1 EP0209433 B1 EP 0209433B1
Authority
EP
European Patent Office
Prior art keywords
blade
piece
sole piece
sole
contact
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
EP86401394A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0209433A1 (fr
Inventor
Daniel Alfred Nourry
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.)
Telemecanique SA
Original Assignee
La Telemecanique Electrique SA
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 La Telemecanique Electrique SA filed Critical La Telemecanique Electrique SA
Publication of EP0209433A1 publication Critical patent/EP0209433A1/fr
Application granted granted Critical
Publication of EP0209433B1 publication Critical patent/EP0209433B1/fr
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/24—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20—Bridging contacts
    • H01H1/2066—Fork-shaped bridge; Two transversally connected contact arms bridging two fixed contacts

Definitions

  • the present invention relates to a support piece for one or more movable contacts, in particular for a circuit breaker-type protective switch device comprising in an insulating housing an interruptible current path on which is disposed at least one pair of cooperating contacts one of which is fixed and the other of which is movable in response to the actuation either of an electromagnetic or thermal tripping member, or of a voluntary tripping member, via a lock.
  • the object of the present invention is to remedy these drawbacks by proposing one and the same part, used in the latching and tripping mechanism of a circuit breaker in particular, which fulfills both the function of contact support (s). mobile (s) as well as the closing function of this (s) mobile contact (s), while also authorizing the opening of the latter (s).
  • These two particular functions which are in fact linked to each other, are therefore now grouped together on a single mechanical part, hence a certain simplification in the production of the circuit breaker mechanism.
  • a support piece of at least one movable contact intended to cooperate with an associated fixed contact, the or each movable contact being capable of occupying either a closed position in which it is applied to its associated fixed contact, ie an open position in which it is separated from its associated fixed contact, said part consisting of a rigid sole bearing at one end the or each movable contact and a blade elastic facing the rigid sole at a distance therefrom situated in a plane substantially parallel to that of the sole, and connected to the latter, by its end on the same side as the second end of the sole, by a part of connection, the elastic blade constituting a spring ensuring the closing of or each movable contact under the effect of a force exerted on the blade, and authorizing the opening of or each movable contact after the effort is released.
  • the connecting part is constituted by a part of the blade, which is rolled and riveted to the sole.
  • the present invention resides in the fact that said part has a one-piece structure comprising a rigid part carrying the movable contact (s) and an elastic part of the leaf-spring type used for closing this (s) mobile contact (s), and ensuring a so-called suitable contact pressure.
  • the support part according to the invention In its mounting in a circuit breaker, the support part according to the invention also has the advantage of not being part of the path taken by the electric current established between the terminals of the circuit breaker, thus simplifying the choice of the material of said part. .
  • the subject of the invention is therefore a support piece of at least one movable contact intended to cooperate with an associated fixed contact, in particular for a protective switch device of the circuit breaker type, the or each movable contact being capable of occupying either a position closing in which it is applied to its associated fixed contact, that is an open position in which it is separated from its associated fixed contact, said part consisting of a rigid sole bearing at one end the or each movable contact, and an elastic blade facing the rigid sole, at a distance therefrom, situated in a plane substantially parallel to that of the sole, and connected to the latter, by its end on the same side as the second end of the sole, by a connecting part, the elastic blade constituting a spring ensuring the closing of or each movable contact under the effect of a force exerted on the blade, and authorizing the opening of or each contact t mobile after release of the force, characterized in that the connecting part is made of a part with the sole and the blade and that the sole is extended, at its first end, by a rigid central tongue ending
  • FIG. 1 there is shown at 10 a support piece of two movable contacts CM, and CM 2 , according to the invention, and intended to be used in a control mechanism, in particular of a switch protection device of the breaker type.
  • control mechanism of a circuit breaker aims, on the one hand, to ensure the closing of the electrical contacts by applying the or each movable contact to an associated fixed contact and, on the other hand, to cause these contacts to open by separating the or each movable contact from its associated fixed contact either following an electrical fault, short circuit or electrical overload, or by voluntary triggering.
  • FIG. 1 there is shown by way of illustration only and without limitation, FIG. 1, two mobile contacts supported by the contact-holding part; of course, the latter can perfectly support only one mobile contact, without departing from the scope of the invention.
  • the support piece proper for example made of steel, is profiled in one piece in several parts of particular shapes obtained by conventional mechanical operations such as cutting, rolling and folding.
  • the part 10 consists first of all of a rigid flat sole 11 of general shape defined by a rectangle, two of the corners of which are symmetrical with respect to the longitudinal axis of the rectangle, have each been eliminated by a short cut parallel to this axis, followed by a long oblique cut.
  • the sole 11 is extended, on its smallest lateral edge 11a, by a part 12 rolled into a cylinder portion, of axis A, perpendicular to the longitudinal direction of the sole.
  • This cylindrical part 12 serves as a connection between the sole 11 and a flexible elastic blade 13 acting as a contact pressure spring and coming opposite the sole, at a distance from the latter.
  • the leaf spring 13, Figure 1 is rectangular, substantially the same length as the sole, and has a portion 13a tangentially connected to the cylindrical part 12, at a central location thereof.
  • the blade 13 is, on the other hand, slightly folded at 14 so that its portion 13b, in the absence of elastic deformation, is arranged parallel to the sole 11, at the level of the central part thereof.
  • the sole 11 is extended by a rigid rectangular central tongue, generally marked at 16, of width slightly greater than that of the leaf spring 13, and profiled so as to present the following three successive branches: a first branch 16a folded perpendicular to the longitudinal direction of the sole 11 and coming opposite the free end of the leaf spring 13, at a slight distance d from the latter ( Figure 2); a second branch 16b folded parallel to the longitudinal direction of said sole and overlapping the leaf spring 13, at a distance from the latter in its rest position illustrated in solid lines in FIG. 2; and a third branch 16c curved in the direction of the leaf spring so that its end comes to bear in P (FIG. 2) on the upper face of the leaf spring 13, transversely with respect thereto, when said leaf is at 'state of rest.
  • the support piece 10 also includes a continuous stiffening molding 20 serving to increase the inertia of said piece and extending longitudinally on the middle of the respective external faces of the different parts, rigid only , of the part, namely the sole 11 and the three branches 16a, 16b and 16c forming the tongue 16.
  • the two movable contacts CM, and CM 2 are formed identically respectively at one of the ends of two parallel arms 22 and 23 slightly bent and projecting in the longitudinal direction of the sole 11 on either side of the central tongue 16; these two arms are connected transversely to each other by a plate 25 which is fixed by any suitable means, such as for example by two rivets 27, for example on the upper surface of the sole 11, on the edge thereof.
  • a plate 25 which is fixed by any suitable means, such as for example by two rivets 27, for example on the upper surface of the sole 11, on the edge thereof.
  • the support part described consists, on the one hand, of a rigid part 11 carrying the movable contact (s) and, on the other hand, of an elastic part 13 forming a pressure spring of contact.
  • FIG. 3 shows in elevation a protective switch device, the contact control mechanism of which comprises the support part according to the invention and as described above with reference to FIGS. 1 and 2.
  • This device is a modular circuit breaker with insulating housing 40, having two pairs of separable contacts, of which only the pair constituted by the movable contact CM 1 and its associated fixed contact CF 1 is visible in FIG. 3, arranged on a planned current path in the housing between a first terminal 41 and a second terminal 42.
  • the housing 40 comprises an electromagnetic tripping member generally identified at 44, and a bimetal thermal tripping member 45, capable of actuating a lock 47 in order to separate the two movable contacts from their two associated fixed contacts, following a fault d electrical origin, short circuit or electrical overload, appearing at terminals 41 and 42.
  • the lock 47 also includes a lever-shaped part 49 in the form of a cradle, of axis XX', having two parallel longitudinal arms 49a and 49b ( Figure 4) connected transversely to each other, on the one hand, at a first end, by a pin 50 of axis A 2 and, on the other hand, at a second end, opposite to the first , by a so-called trigger part 52 having a shoulder 52a ( Figure 3).
  • This lever 54 is carried by a support 55 cooperating with a rotary wheel 57 accessible from the outside of the housing and carrying graduations corresponding to various direct or relative values of the thermal trip current, via a finger 58 engaged in a groove 59 hollowed out in the wheel.
  • the lever 49 is subject to a double pin spring 61 mounted on the fixed axis A, and whose two free ends 61a a and 61b respectively come into abutment on the underside of two tabs coaxial cylindrical 63 and 64 respectively mounted perpendicularly on the two arms 49a and 49b of the lever; these spring ends are capable of exerting on each of the cleats of the lever 49 an ascending force f 2 illustrated in FIG. 3.
  • the hairpin spring 61 has a branch 61 c folded transversely with respect to the axis XX '(FIG. 4) and coming to rest on a stop 66 (FIG. 3) provided in the housing 40.
  • a so-called voluntary tripping member such as, for example, a pivoting lever 68, of fixed axis A 3 , is associated with the front face of the case 40 of the circuit breaker, and is conventionally biased by a spring not shown which tends to rotate it according to the arrow f 3 about its axis A 3 .
  • the lever 68 is, on the other hand, connected to the lever 49 by a toggle link 70 coming to rest, in the engaged position ( Figure 3) on a stop 71 provided in the housing 40, and ending in two bearing surfaces 70a and 70b rendered secured respectively to the two arms 49a and 49b of the lever 49 (FIG. 4), and each capable of moving in a guide slot made in the housing 40.
  • the electromagnetic trip member 44 of the circuit breaker is conventionally composed of a coil 75 inside which is capable of axially sliding a core 76.
  • the latter is, on the other hand, articulated in 77 to a lever 78 mounted, at one of its ends, on a fixed axis A 4 , and the other end of which is disposed in abutment on a hoop part 80 also forming a lever.
  • This part 80 is itself mounted at one of its ends, on a fixed axis A5, and its free end is arranged, via a ramp, opposite a stop lug disposed on the same end of the lever as that coming to bear against the triggering part 52.
  • the current path 1 established between terminals 41 and 42 when the circuit breaker is tripped comprises the conductor 85a, the bimetallic strip 45, the flexible conductor 85b, the winding of the coil 75 of the electromagnetic trip device, the conductor 85c, the two pairs of contacts (CF 1 , CM 1 , CF 2 -CM 2 ) with the connection between the two movable contacts which is provided by the two arms 22 and 23 and the plate 25 ( Figure 1), and the conductor 85d.
  • the movable contact is then connected to the terminal 42 of the housing via a flexible conductor.
  • the circuit breaker shown in Figure 3 operates as follows.
  • the bimetallic strip 45 undergoes a deflection of amplitude D towards the lever 54 and forces the latter to pivot clockwise to release it from the shoulder 52a of the triggering part 52.
  • the lever 54 released from the part 52, and under the effect of the combined forces f 2 and of the reaction to f "the lever 49 pivots clockwise around the bearings 70a and 70b of the toggle mechanism 70.
  • the core 76 of the coil of the electromagnetic trip device undergoes a rectilinear displacement according to the arrow f 5 of FIG. 3 and constrains the lever 78 to pivot counterclockwise.
  • the latter requests the part 80, the free end of which moves upwards and comes into abutment on the lug mounted at the end of the lever 54 to drive the latter out of the shoulder 52a of the triggering part 52. Consequently , as before, the lever 49 pivots clockwise around the spans of the toggle mechanism 70.
  • the leaf spring of the contact-carrying part according to the invention allows the opening of the movable contacts after the force produced by the journal of the lever on the said leaf spring has been released.
  • each of the bearing surfaces of the toggle joint 70 moves in a guide slot made in the housing 40 of the circuit breaker.
  • FIG. 8 represents this slot 90, of generally oblong shape, in which the bearing 70a for example moves to pass from a low position 70a l when the circuit breaker is tripped, to a high position 70a 2 during tripping of the circuit breaker.

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EP86401394A 1985-07-19 1986-06-25 Pièce de support de contacts mobiles, notamment pour appareil interrupteur de protection Expired EP0209433B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8511076A FR2585177B1 (fr) 1985-07-19 1985-07-19 Piece de support de contacts mobiles, notamment pour appareil interrupteur de protection
FR8511076 1985-07-19

Publications (2)

Publication Number Publication Date
EP0209433A1 EP0209433A1 (fr) 1987-01-21
EP0209433B1 true EP0209433B1 (fr) 1989-08-02

Family

ID=9321461

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86401394A Expired EP0209433B1 (fr) 1985-07-19 1986-06-25 Pièce de support de contacts mobiles, notamment pour appareil interrupteur de protection

Country Status (7)

Country Link
US (1) US4731510A (pt)
EP (1) EP0209433B1 (pt)
JP (1) JPS6226733A (pt)
BR (1) BR8603372A (pt)
DE (1) DE3664835D1 (pt)
ES (1) ES2000531A6 (pt)
FR (1) FR2585177B1 (pt)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3940228A1 (de) * 1989-12-05 1991-06-06 Asea Brown Boveri Schaltwerk fuer einen elektrischen schalter
US5198631A (en) * 1991-09-11 1993-03-30 General Electric Company Pressure responsive control device
DE19527045C2 (de) * 1995-07-25 2002-02-14 Abb Patent Gmbh Kontaktanordnung für ein elektrisches Schaltgerät
KR100306488B1 (ko) * 1999-07-22 2001-11-01 김석순 과부하 차단 기능을 갖는 스위치
US6831237B1 (en) * 2003-11-25 2004-12-14 Honeywell International Inc. Swing arm switch actuator assembly
US11031196B2 (en) * 2019-01-04 2021-06-08 C&K Components S.A.S. Electric switch of the normally open type
DE102019135386A1 (de) * 2019-01-04 2020-07-09 C & K Components Sas Elektrischer Schalter vom Schliessertyp

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1362379A (en) * 1920-12-14 Electric switch
US1779659A (en) * 1924-02-09 1930-10-28 Gen Electric Switch-contact mechanism
US2443047A (en) * 1946-05-31 1948-06-08 Gen Electric Electric switch contact
US2788421A (en) * 1953-05-12 1957-04-09 Westinghouse Electric Corp Circuit breaker contact structure
US2802922A (en) * 1954-09-13 1957-08-13 Gen Electric Contact arm assembly for circuit interrupter
FR1413083A (fr) * 1964-03-14 1965-10-08 Commutateurs à contacts multiples préréglés
FR1498344A (fr) * 1966-05-12 1967-10-20 Comp Generale Electricite Coupe-circuit automatique
GB1217480A (en) * 1968-06-18 1970-12-31 Patinvest Electric pressure-controlled snap switch
US3864652A (en) * 1974-03-04 1975-02-04 Ite Imperial Corp Floating contact means
JPS5988835U (ja) * 1982-12-06 1984-06-15 ホシデン株式会社 スイツチ
US4472701A (en) * 1983-04-14 1984-09-18 Gte Laboratories Incorporated Electrical circuit breaker
FR2574987B1 (fr) * 1984-12-13 1987-04-24 Telemecanique Electrique Appareil interrupteur de protection

Also Published As

Publication number Publication date
US4731510A (en) 1988-03-15
ES2000531A6 (es) 1988-03-01
EP0209433A1 (fr) 1987-01-21
DE3664835D1 (en) 1989-09-07
FR2585177B1 (fr) 1987-10-30
BR8603372A (pt) 1987-02-24
JPS6226733A (ja) 1987-02-04
FR2585177A1 (fr) 1987-01-23

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