EP0099019B1 - Relais avec ressort de contact de pontage - Google Patents

Relais avec ressort de contact de pontage Download PDF

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Publication number
EP0099019B1
EP0099019B1 EP83106253A EP83106253A EP0099019B1 EP 0099019 B1 EP0099019 B1 EP 0099019B1 EP 83106253 A EP83106253 A EP 83106253A EP 83106253 A EP83106253 A EP 83106253A EP 0099019 B1 EP0099019 B1 EP 0099019B1
Authority
EP
European Patent Office
Prior art keywords
contact
relay
armature
bridge
contact spring
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
EP83106253A
Other languages
German (de)
English (en)
Other versions
EP0099019A1 (fr
Inventor
Robert Esterl
Josef Dr. Weiser
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
Publication of EP0099019A1 publication Critical patent/EP0099019A1/fr
Application granted granted Critical
Publication of EP0099019B1 publication Critical patent/EP0099019B1/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
    • H01H1/18—Contacts characterised by the manner in which co-operating contacts engage by abutting with subsequent sliding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/64—Protective enclosures, baffle plates, or screens for contacts
    • H01H1/645—Protective enclosures, baffle plates, or screens for contacts containing getter material
    • 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
    • H01H2001/145—Contacts characterised by the manner in which co-operating contacts engage by abutting by crossing each other, the cooperating contacts each having a contact making ridge perpendicular to each other

Definitions

  • the invention relates to a relay according to the first part of patent claim 1.
  • Such an electromagnetic relay is shown in DE-A-18 16 364, this known relay being constructed very simply with a few parts.
  • a U-shaped core is anchored in the coil former, above which a flat armature is arranged parallel to the coil axis and the connection level of the relay.
  • the armature is connected to a current-carrying support part via a spring, and the spring also serves as a contact spring.
  • Such a relay can be made relatively small; but then it has only a small contact stroke, so that no high currents can be switched. When switching very small currents, on the other hand, there is a risk of foreign layers forming on the contact surfaces, which increase the contact resistance and limit the service life of the relay.
  • the contact springs there have a T-shape, so that it is possible to compensate for tolerances between the counter-contact elements by twisting the contact springs.
  • Applying the contact arrangement provided there to a relay of the type mentioned at the outset would lead to an undesirably large design.
  • the object of the invention is to provide a small, with few simple parts to produce relay of the type mentioned, the contact system is suitable with a small armature stroke both for switching very small currents with a long service life and over a high load range up to very large currents can be applied.
  • the design and arrangement of the bridge contact spring achieve both a leverage effect about the clamping axis and an additional leverage effect about an axis perpendicular to the clamping axis.
  • a thrust-friction-rolling movement is generated at the contact points, which comes about through the two mutually perpendicular lever effects between the clamping of the spring on the armature and the counter-contact elements.
  • This frictional movement causes strangers to be rubbed through when shifting.
  • foreign particles lying on the contact surfaces are rubbed away or pushed away.
  • unevenness caused by the material migration occurring is leveled out as it arises. Because of the large peeling forces in the micro range, welds on the contacts are torn open despite the smaller contact forces.
  • the plate-shaped armature which is supported at one end on one leg of the U-shaped upwardly bent coil core, is connected to the bridge contact spring via an intermediate insulating part.
  • This insulating part can be formed by extrusion coating or other embedding of the armature.
  • the anchor it would also be possible to connect the anchor to the insulating part by plugging it in.
  • the insulating part has an elastic leg which runs parallel to the connecting lug of the bridge contact spring and serves as a return spring for the armature. This elastic leg can be supported on a cut-out tab of the bridge contact spring in the area of the connecting lug.
  • the armature can be arranged with the bridge contact spring over the coil as in DE-A-1 816 364 be, the air and creepage distances required for high currents can be easily realized.
  • the armature with the part of the bridge contact spring lying on it is arranged within the coil body approximately along the axis, the bridge contact spring forming two contact points with the two counter-contact elements outside the coil body with its transverse leg.
  • the bridge contact spring is T-shaped, it being fastened to the armature with the end of its middle leg and carrying the contact points at the free ends of the cross leg.
  • the bridge contact spring can be attached with its elongated leg at one end to the anchor and can carry a contact leg at least on one side via a lateral intermediate web at its free end.
  • the bridge contact spring can also be meandering in the region between the clamping point and the contact points.
  • Fig. 1 shows a T-shaped bridge contact spring 1, as it is suitable for a relay for switching low current. It is clamped with its elongated leg 1 a in a support 2, namely it is firmly connected to an anchor, not shown, via this support 2. It is therefore operated via this carrier 2 and not via its own contact slide.
  • the cross leg 1b has at the ends the contact points or contact rivets 3 and 4, which interact with the respective counter-contact elements.
  • leg 1a with length 1 acts as a lever arm in the longitudinal direction, via which a thrust-friction-rolling movement can be achieved at the contact points.
  • the cross lever with the cross leg 1b acts perpendicular to this. wherein the lever arm is half the width b between the two contact points 3 and 4 with respect to the spring longitudinal axis. Both levers come into effect due to the armature actuation when contact is made and when contact is opened, whereby a frictional movement with the effects already mentioned is achieved at the contact points.
  • the relay can be adapted particularly well to various switching problems. 2, double contact can be achieved, the switching voltage U being applied between the connections of the bridge contact spring 1 on the one hand and the mating contact elements 5 and 6 connected in parallel on the other. Such double contacting increases switching reliability, especially when switching small loads.
  • the switching voltage U is between the two mating contact elements 5 and 6, so that the bridge contact spring 1 is used only as a contact bridge without its own connection. In this case, the double contact distance that can be achieved with bridge contact is used.
  • the switching voltage U is in turn between the bridge contact spring 1 and the two mating contact elements 5 and 6.
  • these mating contact elements are not directly connected in parallel, but an additional resistor 7 is connected in series with the mating contact element 5.
  • the mating contact element 5 has one smaller contact distance d1 compared to the contact distance d2 of the mating contact element 6 compared to the bridge contact spring 1.
  • the mating contact element 5 thus serves as a forward contact, which switches earlier; Such an arrangement can be advantageous in the case of high current peaks.
  • FIG. 5 shows a meandering bridge contact spring 21 which, due to the cuts 22 and 23, has a two-fold reduction in cross section between the contact bridge 24 and the clamping point 25 to approximately one third of the other spring width.
  • a modified embodiment of a contact spring 26 is shown in FIG. 6. There, on the free end of the contact spring 26, a contact leg 28 is formed on both sides via a web 27, which together as a contact bridge produce the above-mentioned leverage effect against the clamping point 26a.
  • the relay has a base body 31 which also serves as a coil body for the winding 32.
  • a U-shaped core 33 is arranged in the coil former, the two side legs 34 and 35 of which lie in the region of a coil flange 36 and 37, respectively. This core 33 can expediently be injected into the base body 31.
  • the coil can also be encapsulated with plastic after winding.
  • An armature 38 is mounted on the side leg 34, which is plate-shaped above the coil, parallel to the base plane, and with its free end a working air gap 39 the Seietenschenkel 35 forms.
  • the armature 38 is held in an insulating part 40, which can be formed, for example, by extrusion-coating the armature. In another embodiment, this insulating material part 40 could also receive the anchor by inserting it or some other type of fastening. Above the insulating part 40 there is a bridge contact spring 41 which extends over the entire coil length and is fixedly connected to the armature 38 via the insulating part 40.
  • a bridge contact spring 41 which extends over the entire coil length and is fixedly connected to the armature 38 via the insulating part 40.
  • pins, webs or other projections can be provided, which hold them by thermoforming on the side edge or in recesses of the spring 41.
  • the bridge contact spring 41 is bent downwards at right angles in the region of the coil flange 36 and thus forms a connecting lug 42 which is inserted through a recess 43 in the base body 31 and anchored there with a bent tab 44.
  • a leg 45 of the insulating part 41 lying in the region of the coil flange 36 serves as a return spring for the armature, wherein it is supported via the nose 47 on a bent-out tab 48 of the bridge contact spring 41.
  • the free end of the bridge contact spring 41 which can be T-shaped, for example according to FIG. 1, carries a contact profile 49, which cooperates with two counter-contact elements 50 and 51.
  • These two mating contact elements are each arranged laterally with their connecting parts 50a and 51a from the coil flange 37 and bent with their contacting ends 50b and 51b into a common plane below the bridge contact spring 41. They are additionally insulated from the armature or core by the leg 52 of the insulating part 40.
  • the lateral arrangement of the mating contact elements also ensures good heat dissipation.
  • the coil flange 37 has in the area between the two counter-contact elements a chamber 53 for receiving a getter pill 54, which is fastened between lamellar ribs 55 of the base body. These lamellae form further insulating sections between the mating contacts, which cannot be easily bridged even by burn-up products.
  • the relay is closed by a plastic cap 56 placed over the base body 31 and sealed on the underside with a fleece 57 which is impregnated with synthetic resin.
  • a rib 58 integrally formed on the cap serves to limit the stroke for the armature or the bridge contact spring 41.
  • the contact spring can be adjusted from above, for example with laser beams, before the cap is applied.
  • FIG. 10 A modified embodiment is shown in FIG. 10.
  • the coil former 61 forms a continuous axial cavity 62, in which a rod-shaped armature 63 is arranged.
  • a U-shaped yoke 64 is inserted from below into recesses in the coil former 61 in such a way that its leg 65 forms a bearing point for the armature 63 in the region of the coil flange 66, while the leg 67 in the region of the coil flange 68 forms a working air gap with the armature forms.
  • a bridge contact spring 69 is connected to the armature 63, which lies over the entire length of the coil tube above the armature and is anchored in the coil flange 66 with its bent leg 70, which serves as a connecting lug. With a suitable preload, the bridge contact spring can also serve as a return spring for the armature.
  • the bridge contact spring is also T-shaped in this case, the cross leg 71 lying on the end face in front of the coil winding in the region of the coil flange 68 and forming two contact points with two mating contact elements 72.
  • the mating contact elements 72 like the mating contact elements 50 and 51, are laterally attached to the coil flange and are bent with their contacting ends into a horizontal plane below the contact leg 71 of the bridge contact spring.
  • a getter pill 73 is fastened in a suitable manner in the coil former over the contact points. This relay is also closed with a cap 74.

Landscapes

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

Claims (10)

1. Relais comportant une bobine d'excitation (32), dont l'axe est parallèle au plan de raccordement, et comportant une armature (38; 63) qui, à l'état fermé, est parallèle au plan de raccordement et coopère avec une culasse formant noyau (33, 34, 35; 64, 65, 67), qui est recourbée vers le haut en forme de U, et est soutenue dans la zone de l'une de ses extrémités, et comportant un ressort de contact (1; 21; 26; 41; 69) qui est relié à l'armature selon une liaison active directe et s'étend parallèlement au-dessus de l'armature en forme de plaque (38; 63) sur toute la longueur de la bobine, comporte, dans la zone du premier flasque de bobine (36; 66), une languette de raccordement (42; 70), qui s'étend perpendiculairement au plan de raccordement, et, dans la zone d'un second flasque opposé de bobine (37; 68), est au moins en vis-à-vis avec un organe de contact antagoniste (5, 6; 50, 51; 72) qui s'étend par sa languette de raccordement (50a, 51a) perpendiculairement au plan de raccordement et est replié, par son extrémité (50b, 51b) établissant le contact, dans un plan parallèle au ressort de contact (41; 69), caractérisé par le fait que le ressort de contact (1; 21; 26; 41) est constitué sous la forme d'un ressort de contact à pont, réuni d'un seul tenant à sa languette de raccordement (42; 70), auquel cas il est relié par une extrémité d'une branche allongée (1a, 26a) à l'armature (38; 63) et porte des plages de contact (3,4) au niveau des extrémités libres de cette branche, et ce par l'intermédiaire d'une branche transversale (1 b; 24; 27), qu'au moins dans une section, la largeur de la branche allongée (la; 26a) est égale au maximum à la moitié de la distance entre les plages de contact (3,4) et que deux organes de contact antagonistes (5, 6; 50, 51; 72) sont disposés, avec leurs languettes de raccordement (50a, 51 a), des deux côtés, sur les faces extérieures du second flasque de bobine (37; 68) et que leurs extrémités (50b, 51b), qui établissent le contact, sont repliées vers l'intérieur dans un plan commun, en étant dirigées l'une vers l'autre tout en étant en vis-à-vis du ressort de contact à pont.
2. Relais suivant la revendication 1, caractérisé par le fait que l'armature (38; 63) est reliée au ressort à pont de contact par l'intermédiaire d'une pièce intercalaire en matériau isolant (40).
3. Relais suivant la revendication 2, caractérisé par le fait que la pièce en matériau isolant (40) est réalisée sous la forme d'un logement de l'armature (38).
4. Relais suivant la revendication 2 ou 3, caractérisé par le fait que la pièce en matériau isolant (40) possède une branche élastique (45) qui s'étend parallèlement à la languette de raccordement (42) du ressort de contact à pont et qui sert de ressort de rappel pour l'armature.
5. Relais suivant la revendication 4, caractérisé par le fait que la branche élastique (45) de la pièce en matériau isolant prend appui sur une languette (4S), dégagée par découpage, du ressort de contact à pont.
6. Relais suivant l'une des revendications 1 à 5, caractérisé par le fait que dans le second flasque de bobine (37) se trouve ménagée, entre les organes de contact antagonistes (50, 51), une chambre (53) servant à recevoir un getter (54), auquel cas les parois latérales de la chambre comportent des parties saillantes en forme de lamelles (55).
7. Relais suivant l'une des revendications 1 à 6, caractérisé par le fait que l'armature (63) est disposée, ainsi que la partie, qui est appliquée sur lui, du ressort de contact à pont (69), approximativement le long de l'axe à l'intérieur du corps de bobine (61), auquel cas le ressort de contact à pont forme avec sa branche transversale (71), à l'extérieur du corps de bobine (61), deux plages de contact munies des deux organes de contact antagonistes (72). -
8. Relais suivant l'une des revendications 1 à 7, caractérisé par le fait que le ressort de contact à pont est réalisé en forme de T, auquel cas il est fixé par l'extrémité de sa branche médiane (la) sur l'armature et porte, au niveau des extrémités libres de la branche transversale (1b), les plages de contact (3, 4).
9. Relais suivant l'une des revendications 1 à 7, caractérisé par le fait que le ressort de contact à pont (26) est fixé par sa branche allongée (26a) sur l'extrémité de l'armature et porte une branche de contact (28) au niveau de son extrémité libre, au moins d'un côté, moyennant l'interposition d'une barrette intercalaire latérale (27).
10. Relais suivant l'une des revendications 1 à 7, caractérisé par le fait que le ressort de contact pont est réalisé avec une forme sinueuse dans la zone comprise entre le point d'ancrage (25) et les plages de contact (24).
EP83106253A 1982-06-30 1983-06-27 Relais avec ressort de contact de pontage Expired EP0099019B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823224468 DE3224468A1 (de) 1982-06-30 1982-06-30 Relais mit brueckenkontaktfeder
DE3224468 1982-06-30

Publications (2)

Publication Number Publication Date
EP0099019A1 EP0099019A1 (fr) 1984-01-25
EP0099019B1 true EP0099019B1 (fr) 1986-11-05

Family

ID=6167257

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83106253A Expired EP0099019B1 (fr) 1982-06-30 1983-06-27 Relais avec ressort de contact de pontage

Country Status (4)

Country Link
US (1) US4540963A (fr)
EP (1) EP0099019B1 (fr)
JP (1) JPS599824A (fr)
DE (2) DE3224468A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8234360U1 (de) * 1982-12-07 1983-06-09 Siemens AG, 1000 Berlin und 8000 München Elektromagnetisches Relais
DE3672019D1 (de) * 1985-02-12 1990-07-19 Siemens Ag Elektromagnetisches relais.
US4937544A (en) * 1988-01-29 1990-06-26 Siemens Aktiengesellschaft "Contact arrangement for a relay"
DE4019236C2 (de) * 1989-12-07 1994-04-14 Matsushita Electric Works Ltd Kontaktvorrichtung sowie mit einer Kontaktvorrichtung ausgestattetes Relais
DE4042424C2 (de) * 1989-12-07 1994-04-21 Matsushita Electric Works Ltd Kontaktvorrichtung sowie mit einer Kontaktvorrichtung ausgestattetes Relais
DE9015406U1 (fr) * 1990-11-09 1992-03-05 Siemens Ag, 8000 Muenchen, De
DE19858755C1 (de) * 1998-12-18 2000-06-08 Euro Matsushita Electric Works Kontakteinheit für elektromagnetische Relais
JP5134657B2 (ja) * 2010-07-27 2013-01-30 富士電機機器制御株式会社 接点機構及びこれを使用した電磁接触器
JP6341361B2 (ja) * 2013-12-13 2018-06-13 パナソニックＩｐマネジメント株式会社 電磁リレー
JP2015153564A (ja) * 2014-02-13 2015-08-24 Ｎｅｃトーキン株式会社 電磁継電器
JP6609096B2 (ja) * 2014-08-07 2019-11-20 株式会社デンソー 電磁スイッチ
US11417475B2 (en) 2019-08-22 2022-08-16 General Equipment And Manufacturing Company, Inc. Electrical switch contact sets

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Also Published As

Publication number Publication date
US4540963A (en) 1985-09-10
DE3224468C2 (fr) 1988-05-19
EP0099019A1 (fr) 1984-01-25
DE3367481D1 (en) 1986-12-11
DE3224468A1 (de) 1984-01-05
JPS599824A (ja) 1984-01-19

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