EP1196933A1 - Relais electromagnetique - Google Patents

Relais electromagnetique

Info

Publication number
EP1196933A1
EP1196933A1 EP00951386A EP00951386A EP1196933A1 EP 1196933 A1 EP1196933 A1 EP 1196933A1 EP 00951386 A EP00951386 A EP 00951386A EP 00951386 A EP00951386 A EP 00951386A EP 1196933 A1 EP1196933 A1 EP 1196933A1
Authority
EP
European Patent Office
Prior art keywords
armature
contact
relay according
leg
relay
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.)
Withdrawn
Application number
EP00951386A
Other languages
German (de)
English (en)
Inventor
Josef Kern
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.)
TE Connectivity Solutions GmbH
Original Assignee
Tyco Electronics Logistics 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 Tyco Electronics Logistics AG filed Critical Tyco Electronics Logistics AG
Publication of EP1196933A1 publication Critical patent/EP1196933A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/001—Means for preventing or breaking contact-welding
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H01H1/5822—Flexible connections between movable contact and terminal

Definitions

  • the invention relates to an electromagnetic relay
  • a core yoke which has at least a first and a second leg and carries a coil on one of the legs
  • An armature which is mounted on a bearing section of the first leg so as to be pivotable about an axis of rotation and forms a working air gap with the second leg, the armature on one side of the axis of rotation having an armature arm extending towards the working air gap and on the other side of the axis of rotation forms an actuating arm, - an armature spring which biases the armature into a rest position,
  • a contact spring which extends over the free end of the actuating arm and can be switched by the armature between a rest position and a working position and carries at least one movable contact, which in the working position and / or in the resting position with at least one fastened on a carrier Fixed contact interacts.
  • Such a relay is described for example in DE 34 06 832 AI.
  • an L-shaped anchor is mounted on end sections of a yoke.
  • the armature has an actuating arm which engages with its end on a contact spring in order to actuate it in one direction against its bias.
  • the lever arm of the actuating arm from the bearing point of the armature to the actuation point is considerably longer than the lever arm of the armature arm between the bearing axis and the pole face in the area of the working air gap.
  • a relatively small switching movement of the armature at the working air gap is therefore converted into a larger contact movement.
  • the spring returns to the rest position due to its own preload. Through the local Setting the armature movement results in relatively small forces on the contacts. This is not a problem in that the known relay is obviously intended for low-voltage applications due to the remaining structure.
  • the aim of the invention is to design a relay of the type mentioned at the outset such that relatively high forces act on the contact spring, in particular when contacts are opened. Due to its variable design, this relay should be able to be used both as a PCB relay and as a relay with flat plugs with different contact variants for different voltages.
  • this object is achieved in a relay of the type mentioned at the outset in that when the armature moves, the contact spring engages at least in one switching direction with a tear-open section of the actuating arm which is at a smaller distance from the axis of rotation than the end of the armature arm which forms the working air gap.
  • the construction according to the invention thus reduces the armature movement on the armature pole face via the actuating arm, so that the dynamic energy of the armature can be used via a short lever arm to weld welded contacts rupturing.
  • An embodiment in which the engagement of the actuating arm is provided with a predetermined play is particularly advantageous. In this case, the actuating arm only engages the contact spring when the armature has already traveled a certain distance and has reached a corresponding speed. It then abruptly attacks the contact spring and can tear open welds particularly well in this way.
  • the invention can be used particularly advantageously in a construction in which the core yoke is approximately U-shaped and the armature is approximately L-shaped, the armature having an armature pole section and the core yoke having a yoke pole section which overlap one another to form the working air gap that their pole faces form an acute angle in the fallen state and are approximately parallel in the tightened state.
  • the pole faces form approximately a right angle to a radius that runs from the axis of rotation of the armature to the front end of the armature pole face in the direction of movement.
  • Such a design of the magnet system prevents the armature from striking the yoke pole surface and the switching noise associated therewith.
  • this system achieves a significantly larger switching angle for the armature than in conventional hinged armature systems, in which the armature hits a core pole face flat. With such an increased angle of rotation of the armature when switching, there is also a sufficiently large contact stroke with the reduction via the short actuating arm.
  • the armature should approach the yoke pole section as far as possible, but not touch it.
  • the end position of the anchor is therefore determined by a stop device.
  • the first leg of the core yoke is in the region of the bearing section for this purpose a bearing pole surface on which the anchor hits when tightening. The impact on this bearing pole surface causes a small switching noise, but not nearly as much as when the movable armature end hits an appropriate core pole surface. Because the section of the armature adjacent to the axis of rotation moves at a significantly lower speed than the peripheral armature part.
  • the anchor is preferably provided with one or more securing lugs which rest on the bearing edge and secure the anchor in the direction of the working air gap.
  • the contact-carrying free end of the contact spring is provided with a cross leg and thus widened in a T-shape, at least one arm of the cross leg carrying at least one movable contact.
  • This movable contact interacts with a fixed contact, whereby depending on the arrangement, a break contact, a make contact or a changeover contact is created; in the latter case, the contact spring carries two opposite movable contacts on its two surfaces.
  • the cross leg can of course also carry one movable contact or two opposite movable contacts on both arms, which are then connected in pairs to one another and interact as a contact bridge with two fixed contacts each.
  • This carrier preferably forms a base plate parallel to the coil axis and to the armature axis of rotation, through which connection pins for the contacts, namely the fixed contacts and - if necessary - for the contact spring are guided vertically outwards.
  • connection pins can be embedded or also inserted into the base plate, ie into the coil former.
  • the fixed contacts are welded directly onto these connection pins, for example.
  • the connection pins are preferably designed as solder pins.
  • the coil body, with its connecting pins guided outwards is plugged onto a base provided with plug connections, the connecting pins each being connected, preferably welded, to corresponding plug connections.
  • FIG. 1 shows a relay designed according to the invention with solder connections in a perspective view
  • FIG. 2 shows a relay according to FIG. 1 in connection with a plug-in base
  • FIG. 3 shows the relay from FIG. 2 in a longitudinal section along the coil axis
  • FIG. 4 shows the relay from FIGS. 2 and 3 in a side view
  • FIG. 5 shows the relay from FIG. 2 with a modified version of the contact arrangement
  • Figure 6 shows the relay of Figure 5 in front view
  • Figure 7 is a schematic representation of the contact wiring of the relay of Figures 5 and 6 with a bridge changeover contact (with separate contact bridges) and
  • FIG. 8 is a schematic representation of a conventional bridge changeover contact.
  • the relays shown in Figures 1 to 6 all have a basic structure of the magnet system.
  • a bobbin 1 which carries a winding 4 between two flanges 2 and 3, serves as the base body. Their winding ends are wound on winding pins 5, which are each injected into the thermoplastic coil body, namely at the periphery of the two flanges 2 and 3.
  • the front flange 3 is extended to a side wall 3a and, together with a base plate 6 which is also formed as an extension, forms a partially delimited contact space in which connecting pins 7 and 8 are anchored.
  • the connection pins 7 are each provided with a fixed contact 9, which is welded on, for example.
  • the connecting pin 8 serves as a connection for a contact spring 10, the movable contacts 11 and 12 of which are connected via a wire 13.
  • the sections of the connection pins 7 and 8 which are led outwards serve as solder connection pins in the example of FIG. 1, while the connection pins 7 and the winding connection pins 5 are placed on a plug base 20 in the example of FIG. 2 and connected to corresponding flat plugs 21, for example welded , are.
  • the stranded wire 13 is connected directly to one of the flat connectors 21.
  • the magnetic circuit of the quiet relay drive used here consists of a core 31, an L-shaped yoke 32 which has a yoke pole section 33 which is angled upwards at an angle, and an approximately L-shaped armature 34 which is mounted on a bearing edge 35 of the core and on its movable end forms an obliquely angled armature pole section 36, which forms a working air gap 37 with the yoke pole section 33. From Figure 3 it can be clearly seen that between the axis of rotation, which is defined by the bearing edge 35, and the armature end in the region of the working air gap 37, a much longer armature arm 38 is formed than an actuating section 39, which is an extension of the armature on the axis of rotation is trained. Because of the different co CO N) NJ P »P»
  • the end of the contact spring 10 which carries the movable contacts 11 and 12 is widened in a T-shape with an integrally formed cross leg 18.
  • the movable contacts are either only on one arm of the cross leg according to FIGS. 1 and 2 or on both arms of this cross leg 18 according to FIGS. 5 and 6.
  • the T-shape of this contact spring end and the load on bending and torsion in the long spring area result when actuated a contact rolling movement that additionally supports the tearing open of any contact hooking or welding that may have occurred.
  • the contact arrangement is modified in that instead of a movable contact pair 11 and 12, which has its own power connection via a wire 13, two contact bridges 51 and 52 are now attached to both surfaces of the contact spring, each with two fixed contacts 53 and 54 and 55 and 56 each close a circuit.
  • the contact spacing would have to be increased significantly compared to conventional relays in order to reliably stop arcing.
  • the arc is distributed over two switching paths, so that again smaller contact spacings can be used as with lower voltages.
  • an insulating layer 57 is introduced between the contact bridges 51 and 52, while all dimensions, including the contact distance x, are otherwise retained. If the contact spring 10 is now switched from the fixed contacts 53 and 54 to the fixed contacts 55 and 56, then the arc 60 or 61 on the fixed contacts 53 and 54 is delete, since he is no longer fed from the opposite side via the contact bridge 52.
  • the relay can of course be terminated in a conventional manner by a cap, not shown, and, if necessary, by a base plate.

Landscapes

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

Abstract

L'invention concerne un relais électromagnétique comprenant un système d'électro-aimant (31, 32) pourvu d'un induit (34) pivotant autour d'un axe de rotation (35). L'induit possède, sur un côté, un long bras d'induit (38) formant l'entrefer de travail (37) et, sur l'autre côté de l'axe de rotation, un bras d'actionnement relativement court (39). Par son bras d'actionnement (39), l'induit est en prise avec un certain jeu avec un ressort de contact (10), ce qui entraîne la transmission avec réduction du mouvement de l'induit au ressort de contact. On obtient ainsi une ouverture dynamique des contacts après des microsoudures. L'invention convient tout particulièrement à des relais présentant, pour éviter ou diminuer le bruit de commutation, un mouvement d'induit relativement lent ainsi qu'un angle de mouvement relativement grand de l'induit.
EP00951386A 1999-07-16 2000-07-14 Relais electromagnetique Withdrawn EP1196933A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19933549 1999-07-16
DE19933549A DE19933549C1 (de) 1999-07-16 1999-07-16 Elektromagnetisches Relais
PCT/EP2000/006752 WO2001006527A1 (fr) 1999-07-16 2000-07-14 Relais electromagnetique

Publications (1)

Publication Number Publication Date
EP1196933A1 true EP1196933A1 (fr) 2002-04-17

Family

ID=7915119

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00951386A Withdrawn EP1196933A1 (fr) 1999-07-16 2000-07-14 Relais electromagnetique

Country Status (5)

Country Link
EP (1) EP1196933A1 (fr)
JP (1) JP2003505830A (fr)
KR (1) KR20020015340A (fr)
DE (1) DE19933549C1 (fr)
WO (1) WO2001006527A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004013471B4 (de) * 2003-04-09 2021-01-21 Te Connectivity Germany Gmbh Elektromagnetisches Relais, insbesondere Hochstromrelais
DE102014103247A1 (de) * 2014-03-11 2015-09-17 Tyco Electronics Austria Gmbh Elektromagnetisches Relais
CN107798186B (zh) * 2017-10-23 2021-04-30 哈尔滨工业大学 一种电磁继电器触簧系统贮存退化表征参数的确定方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1209184A (fr) * 1983-02-28 1986-08-05 Mitsuki Nagamoto Relais electromagnetique
DE3630371A1 (de) * 1986-09-05 1988-03-10 Siemens Ag Elektromagnetisches kleinschaltrelais
DE9015406U1 (de) * 1990-11-09 1992-03-05 Siemens AG, 8000 München Elektromagnetisches Relais mit auf dem Anker befestigter Kontaktfeder
US5852392A (en) * 1995-12-07 1998-12-22 Letra, Inc. Electromagnetic relay

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0106527A1 *

Also Published As

Publication number Publication date
KR20020015340A (ko) 2002-02-27
DE19933549C1 (de) 2001-05-10
WO2001006527A1 (fr) 2001-01-25
JP2003505830A (ja) 2003-02-12

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