EP0072975B1 - Elektromagnetisches Relais - Google Patents

Elektromagnetisches Relais Download PDF

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Publication number
EP0072975B1
EP0072975B1 EP82107301A EP82107301A EP0072975B1 EP 0072975 B1 EP0072975 B1 EP 0072975B1 EP 82107301 A EP82107301 A EP 82107301A EP 82107301 A EP82107301 A EP 82107301A EP 0072975 B1 EP0072975 B1 EP 0072975B1
Authority
EP
European Patent Office
Prior art keywords
armature
relay
contact
coil
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
EP82107301A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0072975A1 (de
Inventor
Rolf-Dieter Dipl.-Phys. Kimpel
Horst Dipl.-Ing. Tamm
Wolfgang Dipl.-Ing. Hübner
Erwin Dipl.-Phys. Steiger
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 AT82107301T priority Critical patent/ATE13373T1/de
Publication of EP0072975A1 publication Critical patent/EP0072975A1/de
Application granted granted Critical
Publication of EP0072975B1 publication Critical patent/EP0072975B1/de
Expired 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
    • H01H50/548—Contact arrangements for miniaturised relays
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/22—Polarised relays
    • H01H51/2236—Polarised relays comprising pivotable armature, pivoting at extremity or bending point of armature
    • H01H51/2245—Armature inside coil

Definitions

  • the invention relates to an electromagnetic relay with an excitation coil and a rod-shaped, in the coil body extending approximately along the coil axis, in the area of the one coil flange on one side mounted armature, which forms a working air gap with at least one pole plate, the armature with at least one contact spring is connected, which extends parallel to the armature substantially over the entire coil length and cooperates with one end in each case with at least one mating contact element.
  • Such a relay is known for example from DE-A-1 806 324.
  • the armature bridges two magnetic poles which are aligned with one another within the coil former and, with its end protruding from the coil, makes contact with mating contact elements arranged outside the coil former.
  • a contact spring arranged inside the coil body is attached directly to the armature and at the same time serves to hold and reset the armature. So that the armature can only form a single changeover contact, nevertheless, the space in the coil body must be relatively large because of the pole plates arranged there and the contact spring.
  • the armature bearing provided there causes a relatively strong friction between armature and pole plate.
  • Another disadvantage of the known relay construction is that only the opposite flat side of the armature is suitable for forming a working air gap due to the direct connection of the contact spring to one side of the armature, so that, for example, a polarized system in which the armature with two opposite pole plates has working air gaps forms, can not be used.
  • the object of the invention is to provide a relay of the type mentioned with high contact reliability, in which a plurality of contact springs can be actuated via the armature and in which the connection of the contact springs to the armature is designed so that on the one hand good contact with less Strain on the spring material is guaranteed and on the other hand, the armature can switch freely over almost its entire length in any magnet system, in particular effective polarized magnet systems can be used.
  • the coil body itself should have the smallest possible diameter.
  • this object is achieved in that the working air gap is formed in the region of the second coil flange, that the armature is supported in the one coil flange by means of a support part which is rigidly connected to the armature and is pivotably arranged on the coil flange and is made of insulating material, so that the contact springs pass through Anchoring in the carrier part made of insulating material are connected to the armature and that these contact springs extend outside the coil and thus at a certain distance from the armature.
  • the insulating support provided according to the invention thus serves to keep the armature and the movable contact springs at a distance from one another and to mount them together on the coil flange.
  • Both the armature and the movable contact springs extend parallel to the coil axis up to the opposite coil flange, the mutual spacing ensuring that the magnet system on the one hand and the contact units on the other hand do not adversely affect one another.
  • the bearing point is so far from the contact points that practically no abrasion can reach the contact surfaces.
  • the bearing friction is very low, so that the elongated design of the armature and the parallel contact springs of the armature stroke cause only a slight pivoting movement in the bearing. Since the armature lies alone in the coil body without additional parts, it takes up little space, so that a coil with a small diameter can be used; this means that a very sensitive polarized magnet system can also be used.
  • Another advantage of the construction according to the invention is that the spring material of the movable contact springs fastened in the carrier is only slightly stressed, the deflections being small due to the large clamping length, and therefore relatively thick contact springs can be used.
  • the relay makes optimum use of the excitation energy, since the energy introduced into the springs is fully converted into contact force without an intermediate actuating slide.
  • the long contact springs freely arranged next to the coil have the advantage that they are easily accessible for adjustment, so that the desired high contact reliability is also ensured in this way. In this case, in particular contactlessly operating adjustment methods can be used, the method with dosed application of heat described in DE-A-2918 100 being particularly important.
  • At least one movable contact spring is expediently arranged symmetrically on both sides of the armature.
  • two movable contact springs it is also possible for two movable contact springs to be fastened one above the other in the carrier, in alignment with one another. In this way, four or more changeover contacts can be constructed.
  • the carrier part is expediently T-shaped, one or more contact springs being anchored in the middle part of the armature and in the two side arms.
  • the contact springs can be fastened with a straight fastening end in the carrier. This attachment can be done in the usual way either by inserting or by embedding, such as injection.
  • the contact springs are angled, with their fastening end emerging from the carrier part perpendicular to the bearing axis and having angled and bent contact limbs.
  • the contact springs anchored in the carrier part each have a first section with a first spring thickness starting from their clamping point and a second section with a second spring thickness in the area of their contacting ends, the second spring thickness being at least half smaller is than the first feather thickness.
  • the contact springs thus have a stepped cross section, the thin end section having high elasticity due to the small spring thickness and ensuring good contact with the respective counter contacts. This thin end section is expediently slit lengthwise to achieve double contact.
  • the thicker first section of the contact springs ensures the necessary spring rate. In addition, this thicker, unslotted area is well suited for adjusting the contact springs.
  • the contact springs can be adjusted without the contact springs being heated in their entire thickness by the heat rays and thereby changing their spring characteristics. This risk would exist with continuously thin contact springs.
  • the first, thicker section is expediently at least half the free spring length of the respective contact spring.
  • the spring thickness in the first section is expediently about three times as large as that of the second section.
  • the carrier part is expediently mounted in recesses of the coil flange by means of molded bearing pins. In another expedient embodiment, it could also have bearing cutting edges which are mounted in corresponding notches in the coil flange.
  • the carrier part can be pressed into the bearing of the coil flange by a spring.
  • This spring can consist of ferromagnetic or non-magnetic metal, but a plastic film can also be used as the spring.
  • the armature can also be held in the bearing by a back plate of the magnetic circuit, a spring or a film being optionally arranged between the back plate and the carrier.
  • An embodiment is particularly expedient in which the recesses of the coil flange are designed as slotted bearing bushes into which the bearing pins can be snapped.
  • These bearing bushes expediently have a diameter which corresponds at least to the diameter of the bearing pins. This results in a low bearing friction; Even a slight play of the bearing journals in the bushes has an imperceptible effect on the switching movements at the end of the armature or at the contacting ends of the contact springs.
  • a contact spring 7 is also anchored in the carrier part 3, which extends next to the coil over its entire length and with its free end can be switched between two counter contacts 8 and 9.
  • the contacting end 7a of the contact spring 7 is moved in a circle around the bearing pin 4, so that it carries out a frictional movement on the counter contacts 8 and 9, respectively. This largely suppresses contact bruises.
  • the carrier part can be made symmetrical to the bearing axis and can accommodate a contact spring 7 on both sides of the armature.
  • the relay shown in FIGS. 2 to 6 has a polarized magnet system and two changeover contacts, although other magnet systems and contact assemblies would also be possible.
  • the relay is built on a base body 11 and closed with an insulating protective cap 12.
  • the edge joint 13 between base body and cap is sealed with casting resin 14, the pressure guides of coil connecting pins 15 also being sealed.
  • On the base body 11 sits in a precisely fitting recess 16 (FIG. 4) a coil body 17 with the winding 18, which is delimited on the end face by the two coil flanges 19 and 20.
  • a rod-shaped armature 21 extends along the coil axis within the coil body and is supported at its end 21b on the coil flange 20 and can make switching movements between two pole plates 22 and 23 with its free end 21a.
  • contact surfaces 25 and 26 are provided on the coil former 17, against which the pole shoes 22 and 23 are pressed by lugs 27 and 28 formed on the coil flanges.
  • the pole plates 22 and 23 are each part of the two yokes 29 and 30, which extend above the coil parallel to the coil axis and to the base body 11.
  • the pole faces of the four-pole permanent magnet 31 opposite the yokes are covered by a flux plate 32, which closes both the permanent flux circuit and the excitation flux circuit.
  • the armature 21 is fastened in a carrier part 34 made of insulating material.
  • the carrier part 34 has an opening 34a in which the armature is fastened by insertion (FIG. 5).
  • a rib 34b formed in the wall of the opening compensates for the greater cutting tolerance of the armature 21 and also ensures that the armature 21 is firmly seated in this plane.
  • the carrier part 34 has molded journals 35 on the top and on the underside, which sit in bearing bushes 36. These bearing bushes 36 are each formed by two resilient holding arms 37 which are formed on the coil flange 20.
  • FIG. 6 shows in a section VI-VI from FIG. 5 a view of the lower bearing bush 36 before the armature is installed.
  • the journals are thus latched between the two resilient holding arms 37.
  • the diameter of the bearing bush 36 is at least as large as the diameter of the bearing journal 35.
  • the parts are manufactured in such a way that, due to the tolerances, there is at least some play between the bearing journal 35 and the bearing bushes 36.
  • the anchor has a small amount of play in the bearing, but this has practically no effect on the switching function due to the long anchor.
  • the carrier part 34 is T-shaped and carries in its two side legs 34c and 34d (see Fig. 5) each a center contact spring 39, which are firmly connected in this way to the armature and join the switching movements without the need for a separate contact slide .
  • the free end 39a of this center contact spring alternately makes contact with one of the mating contact elements 40 or 41, which are provided in the usual way with contact pieces or contact surfaces.
  • the center contact springs 39 are each connected to a connecting pin 43 via a strand 42.
  • the mating contact elements 40 and 41 are each anchored directly in the base body 11.
  • the center contact springs 39 are each embedded with their fastening ends 39b in a side leg 34c or 34d of the carrier part 34. They emerge laterally opposite one another from the carrier part 34 and are then bent and angled so that their free ends 39a extend parallel to the anchor.
  • the two yokes 29 and 30 are pushed onto the coil former 17 in such a way that the pole plates 22 and 23 are positioned between the contact surfaces 25 and 26 on the one hand and the lugs 27 and 28 on the other hand.
  • the yokes 29 and 30 rest on shoulders 44 and 45 of the coil flanges 19 and 20, respectively. They are fixed together with the permanent magnet 31 and the flux plate 32 by two pins 46 and 47, which are molded onto the thermoplastic coil body 17. These pins 46 and 47 are through recesses 48 and 49 of the flow plate 31st inserted and deformed over the flow plate to rivet heads 46a and 47a.
  • the armature in its two end positions also has a defined distance from the mating contact elements 40 and 41 on both sides of the coil body. Since the mating contacts 40 and 41 can be aligned very precisely to one another in the inserted or injected state, only the center contact springs 39 need be adjusted during assembly, which in turn are firmly connected to the armature 21, so that no additional tolerances result a contact slide or the like occur.
  • the center contact adjustment is a path adjustment and can be easily automated.
  • additional insulating ribs 50 and 51 are arranged on both sides of the coil on the base body 11.
  • FIG. 7 shows in a perspective view once again the carrier part 34 with the inserted armature 21 and the two center contact springs 39.
  • the distance that these center contact springs 39 have from the armature bearing (journal 35) results in one each on the contact pieces 39c Frictional movement with respect to the mating contacts 40 and 41.
  • intermediate parts could also be embedded in the carrier part 34, to which the contact springs 39 are riveted or welded outside the carrier part.
  • Fig. also shows a perspective view of a modification compared to Fig. 7.
  • the support member 54 carries the anchor 21 as before and is mounted with a pin 55.
  • this carrier part 54 has in its side part 54a two superimposed center contact springs 56 and 57, so that two superimposed changeover contacts are created with corresponding mating contact elements.
  • This arrangement could also be expanded in a manner not shown in such a way that the support part 54 also contains a side part 54a symmetrically on the other side of the armature, with contact springs 56 and 57 also lying one above the other.
  • Fig. 9 shows further modifications compared to the previously shown relay.
  • a view from above of the coil is shown, similar to FIG. 3. 3, the armature 21 has a carrier part 58 with longer side arms 59, in each of which contact intermediate pieces 60 are embedded.
  • Center contact springs 61 are welded to each of these contact spacers, and they are also connected to connection pins 63 in the base body 11 via connection springs 62.
  • a further modification in the illustration according to FIG. 9 consists in the mounting of the armature or the support part 58.
  • the support part 58 has molded-on bearing cutters 64 which engage in corresponding bearing notches 65 of the coil former 66.
  • the carrier part is pressed into these bearing notches 65 via a film 67.
  • the film itself is held by a bent sheet metal bracket 68, which can be part of the flow sheet 32 (FIG. 2).
  • bearing journals can also be provided, which rest against corresponding recesses in the coil former and are held in these recesses by a spring or by a film.
  • Fig. 10 shows a perspective view of a modified embodiment of the support member with armature and contact springs.
  • the armature 71 together with the two contact springs 72 and 73 is anchored in parallel in a carrier part 74, for example by embedding or also by insertion.
  • This carrier part 74 is constructed and stored in a similar manner to that in the previously described exemplary embodiments.
  • the thickness of the spring in the first section 72a or 73a in the exemplary embodiment is approximately 0.5 mm, while the thickness in section 72b or 73b is approximately 0.17 mm.
  • the thin section 72b or 73b with the longitudinal slot 75 or 76 in each case results in a high degree of elasticity and thereby a high level of contact reliability, the slot 75 or 76 ensuring decoupling of the contacting end surfaces 72c and 72d or 73c and 73d .
  • the thicker sections 72a and 73a each provide the necessary spring rate for the overall spring, and these unslit sections are also well suited for adjusting the contact springs.
  • contactlessly attacking adjustment means can be used, such as the application of heat, for example by laser beams. In this way, a very precise adjustment of the relay can be carried out, which in turn contributes to the contact reliability.
  • the contact springs 72 and 73 can most conveniently be cut from a sheet metal strip with a graduated cross section.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
  • Valve Device For Special Equipments (AREA)
  • Cookers (AREA)
  • Surgical Instruments (AREA)
  • Breakers (AREA)
EP82107301A 1981-08-14 1982-08-11 Elektromagnetisches Relais Expired EP0072975B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82107301T ATE13373T1 (de) 1981-08-14 1982-08-11 Elektromagnetisches relais.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3132239 1981-08-14
DE3132239A DE3132239C2 (de) 1981-08-14 1981-08-14 Elektromagnetisches Relais

Publications (2)

Publication Number Publication Date
EP0072975A1 EP0072975A1 (de) 1983-03-02
EP0072975B1 true EP0072975B1 (de) 1985-05-15

Family

ID=6139363

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82107301A Expired EP0072975B1 (de) 1981-08-14 1982-08-11 Elektromagnetisches Relais

Country Status (5)

Country Link
US (1) US4491813A (enrdf_load_stackoverflow)
EP (1) EP0072975B1 (enrdf_load_stackoverflow)
JP (1) JPS5838432A (enrdf_load_stackoverflow)
AT (1) ATE13373T1 (enrdf_load_stackoverflow)
DE (2) DE3132239C2 (enrdf_load_stackoverflow)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3138265C2 (de) * 1981-09-25 1986-10-16 Sds-Elektro Gmbh, 8024 Deisenhofen Elekromagnetisches Schaltgerät
DE3210654A1 (de) * 1982-03-23 1983-10-06 Siemens Ag Elektromagnetisches relais
DE3213759A1 (de) * 1982-04-14 1983-10-20 Siemens AG, 1000 Berlin und 8000 München Elektromagnetisches relais
DE3213737A1 (de) * 1982-04-14 1983-10-20 Siemens AG, 1000 Berlin und 8000 München Elektromagnetisches relais
DE3220985A1 (de) * 1982-06-03 1983-12-08 Siemens AG, 1000 Berlin und 8000 München Elektromagnetisches drehankerrelais
DE3311308C1 (de) * 1983-03-28 1984-10-25 Siemens AG, 1000 Berlin und 8000 München Kontaktanordnung für ein Relais
DE3424464A1 (de) * 1984-07-03 1986-01-16 Siemens AG, 1000 Berlin und 8000 München Polarisiertes elektromagnetisches miniaturrelais
SE445505B (sv) * 1984-11-13 1986-06-23 Tocksfors Verkstads Ab Elektriskt rele
ATE53703T1 (de) * 1985-02-12 1990-06-15 Siemens Ag Elektromagnetisches relais.
DE3600856A1 (de) * 1986-01-14 1987-07-16 Siemens Ag Sicherheits-schaltrelais
JP2003115248A (ja) * 2001-10-01 2003-04-18 Tyco Electronics Ec Kk 電磁継電器
US20070009628A1 (en) * 2005-07-11 2007-01-11 Rampf Molds Industries, Inc. Systems and methods for attaching and aligning a tamperhead in production machinery
DE102014103247A1 (de) * 2014-03-11 2015-09-17 Tyco Electronics Austria Gmbh Elektromagnetisches Relais

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE757518C (de) * 1938-12-10 1954-02-01 Mix & Genest A G Verfahren zur Erzeugung der erforderlichen Vorspannung bei gebogenen Kontaktfedern
CH312408A (de) * 1953-06-15 1955-12-31 Fkg Ag Kontaktanordnung für elektrische Schalteinrichtungen.
US3201541A (en) * 1963-05-15 1965-08-17 American Mach & Foundry Pivotal bearing arrangement for electromagnetic operator
DE1213917B (de) * 1965-03-04 1966-04-07 Hans Sauer Polarisiertes elektromagnetisches Relais
DE6604291U (de) * 1966-08-03 1970-01-02 Westfaelische Metall Industrie Elektromagnetisches relais, insbesondere fuer signalgeraete in kraftfahrzeugen
DE1665958A1 (de) * 1967-06-12 1971-04-08 Siemens Ag Hochbelastbare Kontaktanordnung
AT290655B (de) * 1968-02-26 1971-06-11 Rau Swf Autozubehoer Steck- und lötbares elektromagnetisches Kleinrelais
DE1764584A1 (de) * 1968-06-28 1971-09-09 Hartmann & Braun Ag Relais mit E-foermigem Kern
US3548131A (en) * 1969-01-30 1970-12-15 Cutler Hammer Inc Snap switch with unitary insulating enclosure
CH514930A (de) * 1969-09-22 1971-10-31 Elesta Ag Elektronik Kleinschütz und Verfahren zur Herstellung desselben
DE2345638B1 (de) * 1973-04-13 1974-06-20 Hans Sauer Elektromagnetisches Relais
AT328544B (de) * 1973-12-28 1976-03-25 Schrack Elektrizitaets Ag E Miniaturrelais
DE2454967C3 (de) * 1974-05-15 1981-12-24 Hans 8024 Deisenhofen Sauer Gepoltes elektromagnetisches Relais
US4150348A (en) * 1976-11-15 1979-04-17 Bunker Ramo Corporation Magnetic latching coaxial switch
DE2723220C2 (de) * 1977-05-23 1979-08-02 Siemens Ag, 1000 Berlin Und 8000 Muenchen Polarisiertes elektromagnetisches Miniaturrelais
JPS5422572A (en) * 1977-07-21 1979-02-20 Omron Tateisi Electronics Co Electromagnet
DE8016573U1 (de) * 1980-06-23 1980-09-18 Siemens Ag, 1000 Berlin Und 8000 Muenchen Elektromagnetisches Flachrelais

Also Published As

Publication number Publication date
US4491813A (en) 1985-01-01
JPS5838432A (ja) 1983-03-05
DE3132239C2 (de) 1986-12-04
DE3263539D1 (en) 1985-06-20
ATE13373T1 (de) 1985-06-15
DE3132239A1 (de) 1983-03-17
JPH0117215B2 (enrdf_load_stackoverflow) 1989-03-29
EP0072975A1 (de) 1983-03-02

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