EP0374304B1 - Relais électromagnétique - Google Patents

Relais électromagnétique Download PDF

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Publication number
EP0374304B1
EP0374304B1 EP88121581A EP88121581A EP0374304B1 EP 0374304 B1 EP0374304 B1 EP 0374304B1 EP 88121581 A EP88121581 A EP 88121581A EP 88121581 A EP88121581 A EP 88121581A EP 0374304 B1 EP0374304 B1 EP 0374304B1
Authority
EP
European Patent Office
Prior art keywords
armature
spring
yoke
bearing
bearing plate
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
EP88121581A
Other languages
German (de)
English (en)
Other versions
EP0374304A1 (fr
Inventor
Herbert Mitschik
Fritz Hinrichs
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Priority to ES198888121581T priority Critical patent/ES2040826T3/es
Priority to EP88121581A priority patent/EP0374304B1/fr
Priority to AT88121581T priority patent/ATE91041T1/de
Priority to DE8888121581T priority patent/DE3882049D1/de
Priority to JP1324132A priority patent/JPH02226632A/ja
Publication of EP0374304A1 publication Critical patent/EP0374304A1/fr
Priority to US07/649,266 priority patent/US5065127A/en
Application granted granted Critical
Publication of EP0374304B1 publication Critical patent/EP0374304B1/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
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/18—Movable parts of magnetic circuits, e.g. armature
    • H01H50/24—Parts rotatable or rockable outside coil
    • H01H50/28—Parts movable due to bending of a blade spring or reed

Definitions

  • the invention relates to an electromagnetic relay with coil, core and yoke and with a flat armature mounted on a free end of the yoke and with a leaf spring for storing and resetting the armature, the leaf spring forming a bearing plate which rests on an outer surface of the yoke and protrudes over the end of the yoke in such a way that a bearing notch for a bearing edge of the armature is formed between the end face of the yoke and the bearing plate, and a return spring is integrally formed on the bearing plate, which engages around the bearing edge of the armature and with one opposite to the bearing plate extending portion engages in a recess of the armature.
  • the softer return spring should also take up as little space as possible and be easy to manufacture and assemble.
  • the return spring has a first section which is cut out in the form of a straight spring tongue from the central region of the bearing plate and divides the bearing plate into two plate sections on which the armature rests only with lateral regions of its bearing edge, and in that the return spring has a second section bent toward the armature and cut in a U-shape in the bent leaf spring plane, which extends with approximately the same shape on both sides of a plane of symmetry intersecting the spring tongue.
  • An essential element of the anchor bearing according to the invention is the specially shaped leaf spring, which performs various functions.
  • the return spring consists - if you look at it stretched into a sheet metal plane - from a straight section in the area of the bearing plate and a substantially symmetrical, approximately ring-shaped section with respect to the axis of the straight section, whereby the overall shape of a question mark is formed.
  • the central cut-out of the tongue-shaped spring section of the return spring from the bearing plate itself also ensures that the contact surface of the armature on the remaining lateral plate sections is considerably reduced, so that the bearing friction becomes small overall.
  • a further reduction in the bearing friction is achieved if the edges of the plate sections facing the spring tongue are bent away from the armature by a small angle, so that the bearing surface for the armature is further reduced; in addition, it is definitely avoided in this way that a sharp Edge of the bearing plate comes into contact with the bearing edge of the anchor.
  • the return spring requires little space, since a substantial part of the spring length is already in the area of the bearing plate and therefore does not require any additional volume.
  • the arcuate or annular end section of the return spring encompasses the armature and projects beyond it, it is expedient to have it run parallel to the armature on the outside. In this way, the bearing and return spring requires practically no space beyond the armature space.
  • the bearing plate expediently has molded-in fastening tabs on both sides, which encompass the yoke, each mounting tab being guided in a recess in the yoke and suspended at its free end in each case at both corners with a latching lug on the edge of the recess.
  • this double attachment of the fastening tabs for the bearing plate has the advantage that the entire leaf spring and thus the armature are positioned more precisely, which in turn ensures the response reliability with the lowest possible excitation power.
  • the recess in the armature is expediently designed as a continuous window, the tip of the return spring resting on an inner wall of the window. In this way, the armature with its recess is easier to manufacture.
  • bent-up limiting lugs are formed on the long sides of the bearing plate on both sides of the armature. At most, the anchor abuts these lateral limiting tabs in a point-like manner in its axis of rotation, so that even when the anchor is displaced from its central mounting, for example by a shock, there is hardly any increase in friction.
  • end-side limiting tabs can also be provided on the end faces of the plate sections.
  • the leaf spring expediently consists of magnetically highly conductive steel, for example a chromium-nickel steel, so that the conduction of the magnetic flux through the bearing is improved.
  • the relay shown in FIG. 1 has a magnet system with a coil 1, an angular yoke 2, a core 3 and a plate-shaped armature 4 mounted on the free yoke end 2a, which forms a working air gap with the core 3.
  • the armature 4 actuates a U-shaped contact spring 6 via a rod-shaped slide 5, which can be switched between fixed mating contact elements 7.
  • the contact spring 6 and the mating contact elements 7 are anchored in a base body 8, which together with a cap 9 forms a housing for the relay.
  • a leaf spring 10 which is now described in more detail with reference to FIGS. 2 to 5, is used for storing and resetting the armature.
  • This leaf spring 10 has a section 11 resting on the yoke end 2a, which serves as a bearing plate and protrudes beyond the yoke end 2a.
  • two side plate sections 12 are formed which, with the end edge 2b of the yoke (FIG. 2), form an approximately rectangular bearing notch, in which the armature with its bearing edge or cut to an acute angle Bearing edge 4b lies. Due to the central free cut, the anchor rests only on relatively short distances of the plate sections 12, so that there is little bearing friction.
  • the plate sections 12 each have boundary tabs 14 bent open opposite the side edges of the armature, against which the armature abuts when it should be moved from the center, for example by an impact. However, the armature only abuts these limiting tabs 14 in the area of its axis of rotation, so that the friction is not significantly increased.
  • end-side limiting tabs 15 are bent upwards, which also catch the armature in the event of impacts in the direction perpendicular to the axis of rotation or parallel to the coil axis.
  • the leaf spring Since the leaf spring also serves to return the armature to its rest position, it has an integrally formed return spring 16, which approximately has the shape of a question mark when projected into a plane.
  • a tongue-shaped straight section 16a is cut free in the center of the bearing plate, that is, between the plate sections 12, which results in an elongated soft spring without requiring additional space.
  • the approximately ring-shaped section 16b of the return spring runs approximately symmetrically to the central axis of the tongue section 16a, the tip 16c, which is returned to the armature, pointing almost again towards the center towards the tongue-shaped section 16a.
  • the entire annular portion 16b is bent around the armature end and extends largely parallel to the outside of the armature, so that the spring does not take up any additional space when one takes into account the already necessary freedom of movement for the armature in the housing.
  • the tip 16c of the return spring engages in a window-shaped opening 4c of the armature and lies on an inner wall of the window such that a restoring moment is exerted on the armature around the bearing edge 4b.
  • 2 shows the anchor in the fallen-off state with solid lines, while the dash-dotted lines show the anchor in the drawn-in state.
  • the leaf spring is hooked onto the yoke by means of two laterally formed fastening tabs 17 which grip around the yoke on both sides.
  • the fastening tabs 17 lie in recesses 2c of the yoke.
  • the ends of the tabs 17 are widened on both sides and thus form locking lugs 18 with which the fastening tabs are hooked onto the edges of the cutouts 2c on both sides.
  • This double detent results in a very precise and secure positioning of the bearing plate sections 12 and the return spring 16.
  • the angled ends 19 of the fastening tabs make it easy to attach them to the yoke without additional special tools.
  • the leaf spring 10 is first placed on the yoke (see FIG. 2).
  • the anchor is then installed, the spring section 16b or 16c first being bent back and then inserted into the window 4c of the anchor.
  • the arc section 16d which initially projects upwards due to its shape (see FIG. 2), is bent downward after the insertion of the armature by the prestress (see 16d ′ in FIG. 2), so that the space required for the spring is further reduced.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
  • Locating Faults (AREA)
  • Optical Recording Or Reproduction (AREA)

Claims (8)

  1. Relais électromagnétique comportant une bobine, un noyau et une culasse ainsi qu'une armature plate (4) supportée par une extrémité de la culasse (2), et un ressort à lame (10) servant à supporter et à rappeler l'armature, présentant les caractéristiques suivantes :
    - le ressort à lame (10) forme une plaque de support (11), qui prend appui sur une surface extérieure de la culasse (2) et qui fait saillie au-delà de l'extrémité (2a) de la culasse de telle sorte qu'une encoche de support pour une arête de support (4b) de l'armature (4) est formée entre les surfaces frontales de la culasse et de la plaque de support (10);
    - sur la plaque de support (11) est formé, d'un seul tenant, un ressort de rappel (16), qui entoure l'arête de support de l'armature (4) et qui s'engage par une section (16c), qui s'étend en direction opposée de la plaque de support, dans un évidement (4c),
    caractérisé par les particularités supplémentaires suivantes :
    - le ressort de rappel (16) possède une première section (16a), qui est découpée librement sous la forme d'une languette élastique et rectiligne à partir de la zone médiane de la plaque de support (11), et qui subdivise la plaque de support en deux sections (12), sur lesquelles l'armature (4) prend appui uniquement par des parties latérales de son arête de support (4b); et
    - le ressort de rappel (16) possède une seconde section (16b) repliée en direction de l'armature (4) et découpée avec une forme en U dans le plan de la section repliée du ressort à lame et qui s'étend avec approximativement la même forme des deux côtés d'un plan symétrique recoupant la languette élastique (16a).
  2. Relais suivant la revendication 1, caractérisé par le fait que la section en forme d'arc (16b) du ressort de rappel (16) est disposé de telle sorte que le plan du ressort à lame est essentiellement parallèle à l'armature.
  3. Relais suivant la revendication 1 ou 2, caractérisé par le fait que les bords (13), tournés vers la languette élastique (16a), des sections (12) de la plaque sont repliés sur un angle faible à partir de l'armature (4).
  4. Relais suivant la revendication 1 à 3, caractérisé par le fait que des languettes de fixation (17) formées des deux côtés sur la plaque de support (11) enserrent la culasse (2), chaque languette de fixation (17) étant guidée dans un évidement (2c) de la culasse et étant accrochée respectivement aux deux angles de son extrémité libre, à des becs d'encliquetage respectifs (18) situés sur le bord de l'évidement (2c).
  5. Relais suivant l'une des revendications 1 à 4, caractérisé par le fait que l'évidement est formé dans l'armature (4) sous la forme d'une fenêtre continue (4c), la pointe (16c) du ressort de rappel (16) prenant appui sur une paroi intérieure de la fenêtre.
  6. Relais suivant l'une des revendications 1 à 5, caractérisé par le fait que des languettes de limitation (17) repliées vers le haut sont prévues sur les côtés longitudinaux des sections (12) de la plaque, des deux côtés de l'armature (4).
  7. Relais suivant l'une des revendications 1 à 6, caractérisé par le fait que des languettes frontales de limitation (15) pour l'armature sont prévues sur les faces frontales des sections (12) de la plaque.
  8. Relais suivant l'une des revendications 1 à 7, caractérisé par le fait que le ressort à lame (10) est réalisé en un matériau magnétiquement bon conducteur, notamment un acier au chrome et au nickel.
EP88121581A 1988-12-23 1988-12-23 Relais électromagnétique Expired - Lifetime EP0374304B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
ES198888121581T ES2040826T3 (es) 1988-12-23 1988-12-23 Rele electromagnetico.
EP88121581A EP0374304B1 (fr) 1988-12-23 1988-12-23 Relais électromagnétique
AT88121581T ATE91041T1 (de) 1988-12-23 1988-12-23 Elektromagnetisches relais.
DE8888121581T DE3882049D1 (de) 1988-12-23 1988-12-23 Elektromagnetisches relais.
JP1324132A JPH02226632A (ja) 1988-12-23 1989-12-15 電磁式の継電器
US07/649,266 US5065127A (en) 1988-12-23 1991-01-30 Leaf spring for an electromagnetic relay

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP88121581A EP0374304B1 (fr) 1988-12-23 1988-12-23 Relais électromagnétique

Publications (2)

Publication Number Publication Date
EP0374304A1 EP0374304A1 (fr) 1990-06-27
EP0374304B1 true EP0374304B1 (fr) 1993-06-23

Family

ID=8199715

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88121581A Expired - Lifetime EP0374304B1 (fr) 1988-12-23 1988-12-23 Relais électromagnétique

Country Status (6)

Country Link
US (1) US5065127A (fr)
EP (1) EP0374304B1 (fr)
JP (1) JPH02226632A (fr)
AT (1) ATE91041T1 (fr)
DE (1) DE3882049D1 (fr)
ES (1) ES2040826T3 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5260677A (en) * 1991-11-04 1993-11-09 Gamble John G Snap-acting normally closed AC relay
DE19544625C2 (de) * 1995-11-30 2001-05-31 Hella Kg Hueck & Co Ankerlagerung für ein Klappankerrelais
US5982257A (en) * 1996-10-31 1999-11-09 Siemens Electromechanical Components, Inc. Integral armature retention spring for electromagnetic relays
ES2240617T3 (es) * 2001-08-10 2005-10-16 Tyco Electronics Amp Gmbh Rele conmutador con resorte de armadura mejorado.
DE102012202084A1 (de) * 2012-02-13 2013-08-14 Siemens Aktiengesellschaft Klappankerlagerung für magnetischen Auslöser

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1094366B (de) * 1958-03-06 1960-12-08 Asea Ab Ankerlagerung bei einem elektromagnetischen Relais
DE7033403U (de) * 1970-09-08 1970-12-17 Kienzle Uhrenfabriken Gmbh Rueckholfeder fuer klappanker.
DE3120117C2 (de) * 1981-05-20 1984-10-31 Siemens AG, 1000 Berlin und 8000 München Magnetsystem für ein Relais
US4670727A (en) * 1985-07-18 1987-06-02 Siemens Aktiengesellschaft Electromagnetic relay
DE3675852D1 (de) * 1985-08-09 1991-01-10 Siemens Ag Elektromagnetisches relais.
US4818965A (en) * 1986-06-23 1989-04-04 Siemens Aktiengesellschaft Electromagnetic relay

Also Published As

Publication number Publication date
US5065127A (en) 1991-11-12
ATE91041T1 (de) 1993-07-15
EP0374304A1 (fr) 1990-06-27
DE3882049D1 (de) 1993-07-29
ES2040826T3 (es) 1993-11-01
JPH02226632A (ja) 1990-09-10

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