EP1684319A1 - Relais électromagnétique à faible bruit de commutation - Google Patents

Relais électromagnétique à faible bruit de commutation Download PDF

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Publication number
EP1684319A1
EP1684319A1 EP05398001A EP05398001A EP1684319A1 EP 1684319 A1 EP1684319 A1 EP 1684319A1 EP 05398001 A EP05398001 A EP 05398001A EP 05398001 A EP05398001 A EP 05398001A EP 1684319 A1 EP1684319 A1 EP 1684319A1
Authority
EP
European Patent Office
Prior art keywords
armature
electromagnetic relay
damping material
magnetic
bearing
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Withdrawn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
EP05398001A
Other languages
German (de)
English (en)
Inventor
Fernando Oliveira
Edgar Nina
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.)
Tyco Electronics Componentes Electromecanicos Ltda
Original Assignee
Tyco Electronics Componentes Electromecanicos Ltda
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 Componentes Electromecanicos Ltda filed Critical Tyco Electronics Componentes Electromecanicos Ltda
Priority to EP05398001A priority Critical patent/EP1684319A1/fr
Publication of EP1684319A1 publication Critical patent/EP1684319A1/fr
Withdrawn legal-status Critical Current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
    • H01H50/30—Mechanical arrangements for preventing or damping vibration or shock, e.g. by balancing of armature
    • H01H50/305—Mechanical arrangements for preventing or damping vibration or shock, e.g. by balancing of armature damping vibration due to functional movement of armature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/02—Bases, casings, or covers
    • H01H2009/0278—Casings containing special noise reduction means, e.g. elastic foam between inner and outer casing

Definitions

  • the present invention refers to a magnetic system for an electromagnetic relay, to an electromagnetic relay and to a method for manufacturing same.
  • the present invention concerns a magnetic system for an electromagnetic relay, wherein said magnetic system comprises a magnetic coil for generating a magnetic field to actuate an armature and a movable contact and wherein said armature is pivotally supported in a bearing.
  • Electromagnetic relays are well known and widely used components. Generally speaking, relays are electromagnetically operated switches. An actuating current on a coil operates one or more galvanically separated contacts or load circuits. The electromechanical relay therefore is a remote control switch capable of switching multiple circuits either individually or simultaneously or in sequence.
  • the primary functions of a relay may be summarized as follows: The galvanic separation of the primary or actuating circuit and the load circuits, single input/multiple output capability, separation of different load circuits for multi-pole relays, separation of AC and DC circuits, interface between electronic and power circuits, multiple switching functions, e. g. delay or signal conditioning, amplifier function.
  • relays may be found in a large variety of application fields. Typical applications for relays include laboratory instruments, telecommunication systems, computer interfaces, domestic appliances, air conditioning and heating, automotive electrics, traffic control, lighting control, building control, electric power control, business machines, control of motors and solenoids, tooling machines, production and test equipment.
  • electromagnetic relays may be used for a multitude of switching appliances, such as air condition, brake lights, electric heating of seats or front/rear windows, rear defrost, window defoggers, wiper controls and wiper/washer control.
  • a damping material is disposed at the armature in a region of said bearing for providing a damping of the armature's movement.
  • a relay according to the present invention therefore minimizes the assembly costs.
  • said damping material is a visco-electric resin, preferably polyurethane or a similar hydro carbonic resin.
  • the damping material may have adhesive characteristics.
  • the electromagnetic relay is of the type of a so called "hinged armature relay" having a yoke for guiding the magnetic field, wherein said armature is a flat armature which is carried by at least one bearing edge of said yoke.
  • the advantageous noise damping characteristics of the damping material may be used advantageously.
  • the armature For a particularly simple and cost-effective mounting of the armature same comprises at least one hook-shaped hinge projection which interacts with the bearing.
  • the magnetic system further comprises a return spring for establishing a defined position of the armature when the magnetic coil is not energized.
  • the damping material is disposed between said return spring and the armature for further reducing switching noises.
  • a particularly uncomplicated and cost-effective possibility of producing said return spring is to form same by a stamped and bent leaf spring.
  • the damping material is applied to the armature by infusing a visco-elastic resin, preferably polyurethane, as a drop onto the armature.
  • a visco-elastic resin preferably polyurethane
  • the return spring has an opening, through which the visco-elastic resin may easily be infused.
  • the electromagnetic relay 100 comprises an energizing magnetic coil 102 for generating a magnetic field to actuate an armature 104 and a movable contact 106 connected thereto.
  • the fixed permeable iron circuit of the relay 100 is formed by a core 108 and an L-shaped yoke 110. This fixed open loop part of the iron circuit is completed when the air gap 112 is closed by the attracting of the armature 104 when the coil 102 is energized.
  • the armature 104 is hinged to the yoke 110 in a way that it may be pivoted around an axis being across to the longitudinal axis of the core 108.
  • This pivoting axis 114 is indicated in Figure 2.
  • the movable contact 106 (also referred to as switching contact) is arranged between two fixed contacts 116 and 118.
  • a return spring 120 is provided for holding the electrical contact between the fixed contact 116 and the movable contact 106 closed when the coil 102 is de-energized.
  • this return spring 120 is formed by a stamped and bent leaf spring.
  • a coil spring may be used to provide the return (or restoring) force on the armature 104 in the de-energized position.
  • the fixed contact 116 is a normally closed contact which is closed under the action of the return spring 120.
  • other contact arrangements which are known with electromechanical relays are also possible.
  • a damping material 122 is disposed at the armature 104 in the region of the bearing 115 in order to provide a damping of the armature's movement.
  • damping material 122 preferably polyurethane or a similar modified hydro carbonic resin may be used.
  • the principles of the present invention may be derived in still more detail from Figures 4 and 5, showing details B and C as indicated Figures 1 and 3, respectively.
  • the armature 104 is connected to the yoke 110 by means of the hook-shaped hinge projection 124 and is thus pivotally connected to the yoke 110 around an axis 114 leading into the drawing plane of Figure 4.
  • a damping material 122 in the form of a drop of an adhesive visco-elastic substance it is disposed onto the armature 104 and the yoke 110 in the region of the hinge projection 124.
  • the damping material 122 adheres to the surfaces of the armature 122 and of the yoke 110, thus providing a mechanical resistance for the pivoting movement of the armature.
  • the damping material 122 has enough elasticity to allow a sufficient movement of the armature 104 for actuating the switching contact 106. Only the velocity of the movement, when the coil 102 is energized, is reduced, thus leading to a significantly reduced switching noise of the relay 100.
  • the viscosity of the damping material 122 is high enough not to be infused between the yoke 110 and the armature 124 in the region of the magnetic circuit in order not to deteriorate the electromagnetic characteristics of the relay 100.
  • the return spring 120 has an opening 126 for the hinge projection 124. Through this opening 126 the damping material 122 can be filed in to be disposed on the armature 104.
  • the damping material 122 is applied with enough thickness to allow the spring 120 to rest partly on the damping material 122 in order to reduce possible noises caused by the movement of the return spring 120.
  • a drop of a visco-elastic adhesive substance for instance polyurethane, is applied as damping material 122 to the armature 104 and the yoke 110 in the region of the bearing 115 of the armature 104.
  • this is done by infusing the damping material 122 through the opening 126 and subsequently performing a curing step.
  • This curing step may be a thermal curing or may use UV radiation.
  • the fully assembled electromagnetic relay 100 may now be mounted in a housing (not shown in the drawings).
  • This housing does not need to possess any particular features for an acoustic encapsulation, but may be optimized with respect to electromagnetic performance, cost-effective production or geometric requirements.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
EP05398001A 2005-01-25 2005-01-25 Relais électromagnétique à faible bruit de commutation Withdrawn EP1684319A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05398001A EP1684319A1 (fr) 2005-01-25 2005-01-25 Relais électromagnétique à faible bruit de commutation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05398001A EP1684319A1 (fr) 2005-01-25 2005-01-25 Relais électromagnétique à faible bruit de commutation

Publications (1)

Publication Number Publication Date
EP1684319A1 true EP1684319A1 (fr) 2006-07-26

Family

ID=34942862

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05398001A Withdrawn EP1684319A1 (fr) 2005-01-25 2005-01-25 Relais électromagnétique à faible bruit de commutation

Country Status (1)

Country Link
EP (1) EP1684319A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2926665A1 (fr) * 2008-01-23 2009-07-24 Cartier Technologies Soc Par A Relais electromecanique a vibrations amorties, et application aux boitiers de commande de chauffage electrique
WO2013178898A1 (fr) 2012-06-01 2013-12-05 Renault S.A.S. Relais electromagnetique comportant une couche d'amortissement revetant des surfaces externes libres
EP2752859A1 (fr) * 2013-01-08 2014-07-09 Volkswagen Aktiengesellschaft Relais de véhicule automobile et procédé de fabrication associé

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1232105A (fr) * 1958-08-12 1960-10-05 Rau Swf Autozubehoer Dispositif pour l'amortissement des bruits dans les relais à armature basculante
JPH0869737A (ja) * 1994-08-31 1996-03-12 Daiichi Denki Kk 小型継電器の消音装置
US20020014936A1 (en) * 2000-03-08 2002-02-07 Juergen Breitlow-Hertzfeldt Electrical component and process for the manufacture thereof
JP2002289080A (ja) * 2001-03-27 2002-10-04 Mitsuba Corp 電磁継電器

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1232105A (fr) * 1958-08-12 1960-10-05 Rau Swf Autozubehoer Dispositif pour l'amortissement des bruits dans les relais à armature basculante
JPH0869737A (ja) * 1994-08-31 1996-03-12 Daiichi Denki Kk 小型継電器の消音装置
US20020014936A1 (en) * 2000-03-08 2002-02-07 Juergen Breitlow-Hertzfeldt Electrical component and process for the manufacture thereof
JP2002289080A (ja) * 2001-03-27 2002-10-04 Mitsuba Corp 電磁継電器

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 07 31 July 1996 (1996-07-31) *
PATENT ABSTRACTS OF JAPAN vol. 2003, no. 02 5 February 2003 (2003-02-05) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2926665A1 (fr) * 2008-01-23 2009-07-24 Cartier Technologies Soc Par A Relais electromecanique a vibrations amorties, et application aux boitiers de commande de chauffage electrique
WO2013178898A1 (fr) 2012-06-01 2013-12-05 Renault S.A.S. Relais electromagnetique comportant une couche d'amortissement revetant des surfaces externes libres
FR2991497A1 (fr) * 2012-06-01 2013-12-06 Renault Sa "relais electromagnetique comportant une couche d'amortissement revetant des surfaces externes libres"
EP2752859A1 (fr) * 2013-01-08 2014-07-09 Volkswagen Aktiengesellschaft Relais de véhicule automobile et procédé de fabrication associé

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