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EP0203515B1 - Relais électromagnétique - Google Patents

Relais électromagnétique Download PDF

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Publication number
EP0203515B1
EP0203515B1 EP86106908A EP86106908A EP0203515B1 EP 0203515 B1 EP0203515 B1 EP 0203515B1 EP 86106908 A EP86106908 A EP 86106908A EP 86106908 A EP86106908 A EP 86106908A EP 0203515 B1 EP0203515 B1 EP 0203515B1
Authority
EP
European Patent Office
Prior art keywords
armature
actuator
movement
contact
opening
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
EP86106908A
Other languages
German (de)
English (en)
Other versions
EP0203515A2 (fr
EP0203515A3 (en
Inventor
Johannes Oberndorfer
Kenji Ono
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.)
Panasonic Electric Works Europe AG
Original Assignee
Euro Matsushita Electric Works AG
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 Euro Matsushita Electric Works AG filed Critical Euro Matsushita Electric Works AG
Priority to AT86106908T priority Critical patent/ATE64038T1/de
Publication of EP0203515A2 publication Critical patent/EP0203515A2/fr
Publication of EP0203515A3 publication Critical patent/EP0203515A3/de
Application granted granted Critical
Publication of EP0203515B1 publication Critical patent/EP0203515B1/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
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H01H50/56—Contact spring sets
    • H01H50/58—Driving arrangements structurally associated therewith; Mounting of driving arrangements on armature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/18—Movable parts of magnetic circuits, e.g. armature

Definitions

  • the invention relates to an electromagnetic relay of the type specified in the preamble of claim 1.
  • each contact spring is guided by an actuator integrally formed on the armature in such a way that when the armature is pivoted between its two end positions by acting on the relay coil, it is moved between a closed position formed with a fixed contact and an open position.
  • Each spring is biased so that it rests resiliently against its actuator in one of the two end positions of the armature and during a part of the armature movement adjoining this end position.
  • the cited document shows both so-called lift-off contacts, in which the contact spring is pretensioned in its closed position and is lifted from the fixed contact under contact with the actuator, and so-called flexure contacts, in which the contact spring is pretensioned in the open position and at corresponding movement of the armature is pressed into the closed position by the actuator.
  • the friction torque mentioned has a particularly critical effect in bistable relays in the central region in which both the magnetic actuating forces acting on the armature and the contact spring forces acting on it cancel each other out.
  • this neutral area is a point that is overcome by the inertial mass of the anchor. Due to the frictional moment always counteracting the armature movement, however, there is a finite neutral area with the danger that the armature, which may inadvertently get into a central position due to a mechanical impact or an electrical impulse corresponding to a partial control, gets caught in it. In this position, the relay is inoperable because the armature can no longer be moved to one of its two defined end positions by normal control.
  • the invention is based on the general object of at least partially eliminating disadvantages such as those which occur in comparable electromagnetic relays according to the prior art.
  • a more specific object of the invention can be seen in designing the electromagnetic relay of the type mentioned at the outset in such a way that the frictional torque counteracting the armature rotation is reduced, the problem of the undesired center position is largely eliminated in the case of a bistable design, and contact bounce caused by armature bouncing is avoided in flexure contacts .
  • the inventive solution to this problem is specified in the characterizing part of claim 1.
  • the game then basically provided in the coupling between actuator and armature causes that point of the actuator at which the contact spring is under tension to follow the contact spring, so that a relative movement between the actuator and the contact spring and the resulting friction is eliminated. Although there is now friction at the coupling point between the actuator and the anchor, this can be significantly reduced if the bearing is designed appropriately.
  • the game provided according to the invention finally has the effect that in flexure contacts, bouncing movements of the armature at the stop in its end position are not necessarily carried out by the actuator and therefore do not lead directly to a contact bounce.
  • the polarized electromagnetic relay shown in FIG. 1 with bistable switching behavior has an essentially H-shaped armature 11 which is pivotably mounted about a central pin 10 and which contains two parallel pole plates 12 and a permanent magnet 13 arranged between them.
  • the pole plates 12 and the permanent magnet 13 are held together by a plastic sheath 14.
  • Between the ends of the pole plates 12 facing each other in pairs are the upwardly projecting legs 15 of an essentially U-shaped yoke, the central web of which passes through a coil arranged under the armature 11 (not visible in FIG. 1).
  • the actuator 21 is essentially E-shaped and, with a central pin 22 with a circular cross section, engages in an opening 23 provided in the plastic casing 14, also with a circular cross section, the opening 23 being a somewhat larger one
  • the pin 22 has a diameter.
  • the axis of the pin 22 and that of the opening 23 run parallel to the axis of the pin 10 supporting the armature 11 and thus perpendicular to the longitudinal extension of the armature 11 and perpendicular to the direction of movement of the actuator 21.
  • the outer legs 24 of the actuator 21 are curved on their outer surfaces about axes that run parallel to the axis of the pin 22.
  • the actuator 21 is made in one piece from plastic.
  • the armature 11 is shown in its one end position, in which the left upper contact spring 17 (and accordingly the right lower contact spring) is in its closed position and presses with its own bias against the fixed contact 19, from the corresponding end the actuator 21, on the other hand, is not touched while the right upper contact spring 17 (and correspondingly the left lower contact spring) is pressed by the end of the actuator 21 facing it into its open position, in which it is lifted off the fixed contact 19. If the armature 11 is now pivoted counterclockwise into its other end position by excitation of the coil, the upper actuator 21 according to FIG. 1 is first guided to the left by the pretensioning of the upper right contact spring 17 until the left end of the actuator 21 is the upper left Contact spring 17 touches.
  • This range of movement is designated by a in the diagram according to FIG.
  • the bias of the left upper contact spring 17 is overcome until the contact spring lifts from its fixed contact 19, this range of movement being designated by b in FIG.
  • the actuator 21 is now moved a little further until the forces exerted by the two upper springs 17 are equal to one another.
  • This third range of movement is designated by c in FIG.
  • the pin 22 of the actuator 21 lies against the inner wall of the bore 23 in the armature in the position shown in FIG. 1.
  • the actuator 21 remains stationary until the clearance between the pin 22 and the bore 23 has been overcome (area d in FIG. 4).
  • the actuator 21 is carried by the armature 11, the right upper contact spring 17 coming into contact with its fixed contact 19 at the end of the range of motion e shown in FIG. 4, at the end of the range of motion f the actuator 21 detaches from the right top contact spring 17, and at the end of the movement range g the other end position of the armature 11 is reached.
  • the driver 21 is not pivoted with the armature 11 around the pin 10, but rather by the contact spring or springs 17 resting against it essentially displaced in its own longitudinal direction, relative movements between the contact springs 17 and the actuator 21 being omitted.
  • the sliding friction taking place in conventional relays in these contact points does not occur in the relay described here.
  • the lever under which the frictional force exerts a torque on the armature is only equal to the radius of the pin 22, but not the same as the distance of the contact spring 17 from the central axis of the armature, as is the case with the driver of the armature firmly connected would be the case.
  • the friction torque thus reduced means in FIG. 4 that the area between the two thin solid lines, which are drawn on both sides of the dash-dotted spring characteristic, is narrow. This also leads to the fact that the central range of movement of the armature, in which the magnetic forces continue to act on it, becomes as wide as possible.
  • the bistable electromagnetic relay shown in FIG. 3 has a rod-shaped armature 31 passing through a coil 30, which is pivotably mounted about a pivot point located at its lower end in FIG. 3.
  • the upper end of the armature can be moved back and forth between the upper ends of two pole plates 32, between which a permanent magnet (not visible in FIG. 3) is arranged.
  • a pair of contact springs 37a, 37b are arranged, each of which is attached to a contact terminal 38 at its lower end.
  • Contact pieces 40 which cooperate with fixed contacts 39a, 39b are attached to the upper free ends of the contact springs 37a, 37b.
  • the movement of the armature 31 on the contact springs 37a, 37b is controlled by an actuator 41 transferred, wherein the contact springs 37a, 37b are inserted into recesses 44 of the actuator 41.
  • the contact springs 37a, 37b of each pair are biased against each other in such a way that they rest resiliently on the boundary walls of the respective recess 44.
  • Each contact spring 37a, 37b forms a lift-off contact with the associated fixed contact 39a, 39b in the first part of the contact closing movement, just as in the relay according to FIG. 1, but a flexure contact in the second and last part of the contact closing movement , the contact pressure being increased by the actuator via the other contact spring.
  • the actuator 41 is provided with a central opening 43 which is dimensioned larger in the direction of movement of the actuator 41 than the width of the armature 31. This results in a play in the coupling between the armature 31 and the actuator 41, similar to the exemplary embodiment according to FIG. 1, that has the same effects as described above.
  • the boundary surfaces 45 of the opening 43 facing the armature 31 are each curved around an axis which is perpendicular to the longitudinal extent of the armature 31 and to the direction of movement of the actuator 41. Therefore, the actuator 41 is not only displaceable with play relative to the armature 31, but also pivotable about the armature 31. This pivotability means that the actuator 41 can be moved in its longitudinal direction in spite of the rotary movement of the armature 31 and therefore relative displacements between the actuator 41 and the contact springs 37a, 37b are avoided. In this case too, only frictional forces occur at the point of contact between actuator 41 and armature 31, which result from the rolling movement taking place there and, moreover, only generate a frictional moment with a lever corresponding to half the width of armature 31.
  • the embodiment described in FIG. 3 also has the advantage described above that even when the armature 31 moves approximately into the left end position shown in FIG arrives and abuts there at the upper end of the pole plate 32, the resulting bouncing movements are not necessarily transmitted to the left contact springs 37a, 37b because of the play present between the armature 31 and the actuator 41 and therefore no contact bounce between the left contact spring 37b and the associated fixed contact 39b effect what would be the case with a rigid connection between armature 31 and actuator 41 or if the actuator was molded onto the armature according to the prior art.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)

Claims (6)

  1. Relais électromagnétique comprenant un induit (11; 31) allongé pouvant être pivoté par le flux magnétique d'une bobine (30) entre deux positions de fin de course, et un ressort de contact (17; 37) qui, par l'intermédiaire d'un actionneur (21; 41), peut être déplacé par ledit induit par rapport à un contact fixe (19; 39), s'étend sensiblement parallèlement à l'induit (11; 31) et est appliqué élastiquement contre l'actionneur (21; 41) dans l'une des positions de fin de course ainsi que pendant une partie du mouvement de l'induit, caractérisé en ce que l'actionneur (21; 42) est couplé avec l'induit (11; 31) avec un jeu efficace en particulier dans sa direction de mouvement.
  2. Relais selon la revendication 1, caractérisé en ce que l'actionneur (21) s'engage avec une tige (22) s'étendant transversalement par rapport à la direction de mouvement, dans une ouverture (23) prévue dans l'induit (11), et que l'ouverture (23) présente dans la direction de mouvement une dimension plus grande que celle de la tige (22).
  3. Relais selon la revendication 2, caractérisé en ce que la tige (22) présente une section transversale circulaire et que l'ouverture (23) présente dans la direction de mouvement un diamètre supérieur à celui de la tige (22).
  4. Relais selon la revendication 1, caractérisé en ce que l'induit (31) traverse une ouverture (43) prévue dans l'actionneur (41) et que l'ouverture (43) présente dans la direction de mouvement une dimension plus grande que celle de la section de l'induit (31) qui la traverse.
  5. Relais selon la revendication 4, caractérisé en ce que les surfaces périphériques (45) de l'ouverture (43) dirigées vers l'induit (31) dans la direction de mouvement sont cintrées autour d'un axe perpendiculaire à la direction de mouvement et à l'extension longitudinale de l'induit (31).
  6. Relais selon l'une des revendications 1 à 5, caractérisé en ce que l'actionneur (21; 41) peut être accroché sur l'induit (11; 31) dans une direction perpendiculaire à la direction de mouvement et à l'extension longitudinale de l'induit (11; 31).
EP86106908A 1985-05-29 1986-05-21 Relais électromagnétique Expired - Lifetime EP0203515B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86106908T ATE64038T1 (de) 1985-05-29 1986-05-21 Elektromagnetisches relais.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3519256 1985-05-29
DE3519256 1985-05-29
DE3520773 1985-06-10
DE3520773A DE3520773C1 (de) 1985-05-29 1985-06-10 Elektromagnetisches Relais

Publications (3)

Publication Number Publication Date
EP0203515A2 EP0203515A2 (fr) 1986-12-03
EP0203515A3 EP0203515A3 (en) 1989-03-22
EP0203515B1 true EP0203515B1 (fr) 1991-05-29

Family

ID=25832654

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86106908A Expired - Lifetime EP0203515B1 (fr) 1985-05-29 1986-05-21 Relais électromagnétique

Country Status (3)

Country Link
US (1) US4743877A (fr)
EP (1) EP0203515B1 (fr)
DE (2) DE3520773C1 (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3637115A1 (de) * 1986-10-31 1988-05-05 Standard Elektrik Lorenz Ag Gepoltes flachrelais
US4843360A (en) * 1987-02-05 1989-06-27 Takamisawa Electric Co., Ltd. Polarized electromagnetic relay
DE4027366A1 (de) * 1990-06-26 1992-03-19 Lucas Elektro Bau Elemente Stellantrieb zur einstellung von zwei lagen
DE9016328U1 (de) * 1990-11-30 1992-04-02 EURO-Matsushita Electric Works AG, 8150 Holzkirchen Elektromagnetisches Relais
US5248951A (en) * 1992-01-15 1993-09-28 Mitsubishi Denki Kabushiki Kaisha Remote controlled relay
DE4208164A1 (de) * 1992-03-13 1993-09-16 Siemens Ag Polarisiertes elektromagnetisches relais
DE19606883C1 (de) * 1996-02-23 1997-04-30 Schrack Components Ag Elektromagnetisches Relais mit kombinierter Kontakt- und Rückstellfeder
DE19606884C1 (de) * 1996-02-23 1997-04-30 Schrack Components Ag Elektromagnetisches Relais
US7659800B2 (en) * 2007-08-01 2010-02-09 Philipp Gruner Electromagnetic relay assembly
US8514040B2 (en) * 2011-02-11 2013-08-20 Clodi, L.L.C. Bi-stable electromagnetic relay with x-drive motor
CN202650990U (zh) * 2012-07-02 2013-01-02 宁波福特继电器有限公司 一种小型大功率磁保持继电器
JP5835510B1 (ja) * 2014-11-10 2015-12-24 オムロン株式会社 リレー
JP6414019B2 (ja) * 2015-10-29 2018-10-31 オムロン株式会社 リレー
JP6471678B2 (ja) 2015-10-29 2019-02-20 オムロン株式会社 接触片ユニット及びリレー
JP6458705B2 (ja) 2015-10-29 2019-01-30 オムロン株式会社 リレー
DE102016117671A1 (de) * 2016-09-20 2018-03-22 Panasonic Industrial Devices Europe Gmbh Elektromagnetisches Relais
FR3082353B1 (fr) 2018-06-08 2022-11-04 Langlade & Picard Dispositif mobile de basculement (f) pour relais electromagnetique monostable basse-tension (entre 110v et 400v)

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH486767A (de) * 1968-02-19 1970-02-28 Siemens Ag Leistungsrelais geringer Bauhöhe mit Umschaltkontaktanordnung
CH504774A (de) * 1968-09-27 1971-03-15 Matsushita Electric Works Ltd Elektromagnetisches Relais
DE2039939C3 (de) * 1970-08-11 1974-07-18 Siemens Ag, 1000 Berlin Und 8000 Muenchen Kontakteinheit für ein elektromagnetisches Relais
FR2395583A1 (fr) * 1977-06-23 1979-01-19 Chauvin Arnoux Sa Relais electromagnetique a contacts a double coupure
US4323945A (en) * 1979-01-25 1982-04-06 Matsushita Electric Works, Ltd. Polarized electromagnetic relay
DE3063933D1 (en) * 1979-01-25 1983-08-04 Sds Elektro Gmbh Arrangement of contact springs for polarized electromagnetic relays
JPS5615522A (en) * 1979-07-18 1981-02-14 Matsushita Electric Works Ltd Electromagnetic relay
DE3047608C2 (de) * 1980-04-10 1986-04-03 Sauer, Hans, 8024 Deisenhofen Elektromagnetisches Relais
DE3149816C2 (de) * 1981-12-16 1986-09-04 Diehl GmbH & Co, 8500 Nürnberg Polarisiertes Relais
DE3220985A1 (de) * 1982-06-03 1983-12-08 Siemens AG, 1000 Berlin und 8000 München Elektromagnetisches drehankerrelais
US4563663A (en) * 1982-07-16 1986-01-07 Fujisoku Electric Co. Ltd. Core member for an electromagnetic relay
JPS59166349U (ja) * 1983-04-22 1984-11-07 オムロン株式会社 有極電磁リレ−

Also Published As

Publication number Publication date
DE3679448D1 (de) 1991-07-04
DE3520773C1 (de) 1989-07-20
US4743877A (en) 1988-05-10
EP0203515A2 (fr) 1986-12-03
EP0203515A3 (en) 1989-03-22

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