WO1998031036A1 - Dispositif de retenue d'un aimant de relais - Google Patents

Dispositif de retenue d'un aimant de relais Download PDF

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Publication number
WO1998031036A1
WO1998031036A1 PCT/US1997/023439 US9723439W WO9831036A1 WO 1998031036 A1 WO1998031036 A1 WO 1998031036A1 US 9723439 W US9723439 W US 9723439W WO 9831036 A1 WO9831036 A1 WO 9831036A1
Authority
WO
WIPO (PCT)
Prior art keywords
armature
pole pieces
core
electromagnetic relay
magnet
Prior art date
Application number
PCT/US1997/023439
Other languages
English (en)
Inventor
James Matthew Halter
Original Assignee
Siemens Electromechanical Components, Inc.
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 Electromechanical Components, Inc. filed Critical Siemens Electromechanical Components, Inc.
Priority to EP97952536A priority Critical patent/EP0950253B1/fr
Priority to JP53090098A priority patent/JP2001508232A/ja
Priority to CA002276751A priority patent/CA2276751A1/fr
Priority to BR9714520-3A priority patent/BR9714520A/pt
Priority to DE69709786T priority patent/DE69709786T2/de
Publication of WO1998031036A1 publication Critical patent/WO1998031036A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/22—Polarised relays
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/02—Bases; Casings; Covers
    • H01H50/04—Mounting complete relay or separate parts of relay on a base or inside a case

Definitions

  • the present invention relates to an electromagnetic relay featuring structure which retains the magnet in place during assembly and operation.
  • Electromagnetic relays generally include a frame structure for receiving a permanent magnet coupled magnetically between an electromagnetic block and an armature.
  • cut-out portions along the magnet's perimeter align with posts protruding from a bobbin on the electromagnetic block to retain the magnet in place.
  • Retention features for example deformable plastic tabs located on the bobbin or other part of the frame, prevent the magnet from backing out.
  • these retention features retain the magnet on the block, however, in assembling the relay additional labor is required to align the magnet with the posts and in fixing the retention features. Further, the retention features may loosen their hold on the magnet over time due to the operation of the relay. Further still, since cutout portions are provided on the magnet, the magnet's magnetism is reduced.
  • the principal objective of this invention is to provide improvements in the frame structure of an electromagnetic relay which permit controlled retention of the magnet assembly both during assembly and in operation.
  • an electromagnetic relay having an insulating base, an electromagnet block on the base which includes a permanent magnet, a core, a bobbin, at least one winding about the core, and a pair of pole pieces extending substantially perpendicularly from the core.
  • At least one magnet retention element is formed on at least one of the pole pieces in a position to retain the permanent magnet in operative juxtaposition relative to the bobbin.
  • the invention also provides an electromagnetic relay comprising an insulating base and an electromagnet block on the base having a core and a pair of pole pieces extending perpendicularly from the ends of the core.
  • the relay further comprises an elongate armature pivotally supported at its central portion and a permanent magnet coupled magnetically between the core and the armature.
  • the magnet induces the same magnetic poles in both the pole pieces and provides an opposite pole in closely adjacent relationship to the central portion of the armature.
  • At least one of the pole pieces includes a magnet retention element positioned to retain the permanent magnet in operative position.
  • At least one movable contact spring is fixedly connected to the armature at a portion intermediate the ends thereof and being formed with contact arms in the vicinity of either armature end portion.
  • the contact arms carry movable contacts to be moved according to the armature movement in and out of contact with corresponding fixed contacts mounted on the base.
  • a pair of torsion pivot arms extend transversely in opposite directions from the at least one contact spring along the pivot axis of the armature. The distal end of either pivot arm is fixedly connected to a support extending on either side of the armature and being part of or fixedly connected to the electromagnetic block.
  • a conductor connecting the contact arms with a movable contact terminal is mounted on the base.
  • the invention provides that the magnet retention element formed on the at least one of the pole pieces retains the magnet in place between the electromagnetic block and the armature. During operation the magnet retention element prevents the magnet from moving out of position.
  • the permanent magnet consists of a bar- shaped or plate-shaped three-pole magnetized permanent magnet disposed between the free ends of the pole pieces, which magnet is magnetized to have the same poles at its lengthwise ends adjacent to the pole pieces and to have the opposite pole intermediate its ends adjacent to the central portion of the armature which is balanced upon this pole.
  • FIG. 1 is an exploded perspective view of a relay constructed in accordance with the present invention
  • FIG. 2 is a perspective view of the relay of FIG. 1 showing details of the magnet retention structure of the present invention
  • FIG. 3 is an enlarged perspective view of the magnet retention structure in accordance with one embodiment of the present invention
  • FIG. 4 is a perspective view of the assembled relay of FIG. 1; and FIG. 5 is an exploded perspective view of an alternative embodiment of the relay;
  • the relay is of bistable operation and of single-pole double-throw contact arrangement.
  • the relay comprises a base 10 of insulating material which defines a main or bottom plane for the relay.
  • a pair of stationary or fixed contact terminals 11 and 12 are fastened in the base 10; these fixed terminals 11 and 12 are disposed perpendicular to the bottom plane and are provided with fixed contacts 13 and 14.
  • a movable contact terminal 15 is disposed parallel to the fixed contact terminals. All the terminals are inserted into slots 16 (not visible) in the base 10 and are fixed by caulking or by any other suitable sealant or method. Further, coil terminals 17 and 18 and a common coil terminal 19 are fastened in the base 10 in a similar manner.
  • a pair of suppression resistors 20 or other components may be arranged on the base 10 and connected to the coil terminals 17, 18 and 19 by clamping their wires between clamping nuts 21 in the base and fork-like clamping claws 22 of the respective coil terminals.
  • the common coil terminal 19 as well as one of the suppression resistors 20 may be omitted.
  • An electromagnet block 30 arranged on the base 10 comprises a bobbin 31 with a pair of coils 32 and 33 wound thereon between end flanges 34 and 35 and a center flange 36.
  • An iron core 37 of cylindrical shape is inserted axially into the bobbin and coils and is coupled at its ends to a pair of plates-like pole pieces 38 and 39 which are arranged in recesses 341 and 351, respectively, of the end flanges 34 and 35 and are provided with through holes 381 and 391, respectively, corresponding in diameter to the core 37.
  • a plate-like elongate permanent magnet 40 is disposed along one lateral side of the bobbin in a plane perpendicular to the base plane and bridging the end flanges 34 and 35 as well as the pole pieces 38 and 39.
  • a magnet retention element 42 is formed on each of the pole pieces 38 and 39 to prevent the magnet 40 from backing out. As shown in Figures 2 and 3, the retention element 42 is a projection extending inwardly from a planar surface 41 of each pole piece 38 and 39. The projection is preferably stamped into each of the pole pieces 38 and 39.
  • the permanent magnet 40 is magnetized in a three-pole manner so as to have the same magnetic poles (south poles S) at both ends and the opposite pole (north pole N) in its center.
  • An elongate, plate-like armature 50 which is slightly bent into a V-shape, is balanced on the center pole N of the permanent magnet 40 so as to form air gaps between its end portions and either one of the pole pieces 38 and 39.
  • Either end of the armature is divided into a pair of legs 51 and 52, respectively, by means of recesses 53 and 54, respectively.
  • a strip-like movable contact spring 55 which is made from a resilient material like stainless steel, is fastened to the central part of the armature 50 by means of rivets 56 or the like.
  • a pair of movable contacts 57 and 58 are fixed to the ends of the movable spring 55 by welding or any other suitable method. Since the movable spring 55 is made from a metal having poor conductivity, a flexible composite copper braid 62 is welded directly between the movable contacts 57 and 58 and the movable spring 55 to carry the load current between these movable contacts and the movable contact terminal 15.
  • the movable spring has a pair of torsion pivot arms 59 extending transversely in opposite directions from a central portion thereof and defining a pivot axis for the armature 50.
  • Each of the pivot arms 59 has an eyelet 60 for fastening the movable spring 55 and the armature 50 on the center flange 36 of the bobbin 30.
  • the bobbin 30 forms a pair of posts 43 extending from the center flange 36 on either side of the armature, and the pivot arms may be fastened by any suitable method.
  • the armature 50 In operation which the coils 32 and 33 are de- energized, the armature 50 is held or kept latched in either of the two stable positions on either one of the pole pieces 38 or 39, respectively.
  • a voltage pulse is applied across an appropriate coil 32 or 33 in case of a dual input wiring.
  • the two coils 32 and 33 are wound in a common direction and have end terminals 44 and 45 as well as a common terminal 46.
  • Armature transfer will occur by applying a voltage pulse across one of the coils 32 or 33.
  • the two coils 32 and 33 are connected in series, and the center winding terminal 46 as well as the common coil terminal 19 can be omitted. In this case, armature transfer will occur by toggling the voltage pulse polarity across the two coils 32 and 33 connected in series.
  • FIG. 5 An exploded view of an alternative embodiment of the electromagnetic relay is shown by Figure 5.
  • the relay generally operates in the same manner and comprises the same components as the relay shown by Figures 1-4, except for the pair of torsion pivot arms 59 included in the latter.
  • a magnet 100 is secured to a bobbin 102 by two pole pieces 104 and 106 having a magnet retention element 108 to prevent the magnet 100 from backing out.
  • a movable spring 110 is fastened to an armature 112 on a center flange 114 of the bobbin 102 by means of rivets 116 or the like.
  • a pair of movable contacts 118 and 120 are fixed to the ends of the movable spring 110 by welding or any other suitable method.
  • the bobbin 102 is provided on a base 122 having a bottom plane which is perpendicular to fixed terminals 124 and 126.
  • Fixed contacts 128 and 130 are disposed through fixed terminals 124 and 126 and braid 132 to secure the fixed terminals 124 and 126 to the relay.
  • the central part of the braid 132 is welded to terminal 134.
  • winding terminals 136, 138 and 140 which are anchored in the bobbin flanges 142, 144 and 146, are connected by welding or any other suitable method to coil terminals 148, 150 and 152 to fully assemble the relay.
  • the embodiments described herein are merely illustrative of the principles of the present invention. Various modifications may be made thereto by persons ordinarily skilled in the art, without departing from the scope or spirit of the invention.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
  • Relay Circuits (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Abstract

L'invention porte sur relais électromagnétique comprenant une base, un bloc d'électro-aimants renfermant un aimant permanent, une âme, une bobine, un enroulement entourant l'âme et une paire de pièces polaires s'étendant perpendiculairement à partir de l'âme. Ce relais comprend au moins un élément de retenue de l'aimant formé sur au moins une des pièces polaires de façon à maintenir l'aimant juxtaposé et actif.
PCT/US1997/023439 1997-01-06 1997-12-17 Dispositif de retenue d'un aimant de relais WO1998031036A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP97952536A EP0950253B1 (fr) 1997-01-06 1997-12-17 Dispositif de retenue d'un aimant de relais
JP53090098A JP2001508232A (ja) 1997-01-06 1997-12-17 リレー磁石保持装置
CA002276751A CA2276751A1 (fr) 1997-01-06 1997-12-17 Dispositif de retenue d'un aimant de relais
BR9714520-3A BR9714520A (pt) 1997-01-06 1997-12-17 Dispositivo de retenção de ìmã para relés
DE69709786T DE69709786T2 (de) 1997-01-06 1997-12-17 Polarisiertes relais mit festhaltevorrichtung für den permanentmagneten

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US77898197A 1997-01-06 1997-01-06
US08/778,981 1997-01-06

Publications (1)

Publication Number Publication Date
WO1998031036A1 true WO1998031036A1 (fr) 1998-07-16

Family

ID=25114942

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1997/023439 WO1998031036A1 (fr) 1997-01-06 1997-12-17 Dispositif de retenue d'un aimant de relais

Country Status (10)

Country Link
EP (1) EP0950253B1 (fr)
JP (1) JP2001508232A (fr)
KR (1) KR20000069919A (fr)
CN (1) CN1123901C (fr)
BR (1) BR9714520A (fr)
CA (1) CA2276751A1 (fr)
DE (1) DE69709786T2 (fr)
ES (1) ES2167024T3 (fr)
TW (1) TW442810B (fr)
WO (1) WO1998031036A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3211653B1 (fr) * 2016-02-23 2019-08-14 Tyco Electronics Componentes Electromecanicos Lda Relais électromagnétique pour trois positions de commutation
CN107833792B (zh) * 2017-11-07 2020-03-06 厦门宏发信号电子有限公司 一种高耐压的超小型电磁继电器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2254873A1 (en) * 1973-12-18 1975-07-11 Gp App Electro Mecaniqu Electro-magnetic bistable relay - has vibration damping contact blade and permanent magnet locking relay
WO1993023863A1 (fr) * 1992-05-15 1993-11-25 Siemens Aktiengesellschaft Agencement de lames de contact de relais de transmission et de commutation de courants eleves
DE4309618A1 (de) * 1993-03-24 1994-09-29 Siemens Ag Polarisiertes elektromagnetisches Relais
US5587693A (en) * 1995-08-07 1996-12-24 Siemens Electromechanical Components, Inc. Polarized electromagnetic relay

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2254873A1 (en) * 1973-12-18 1975-07-11 Gp App Electro Mecaniqu Electro-magnetic bistable relay - has vibration damping contact blade and permanent magnet locking relay
WO1993023863A1 (fr) * 1992-05-15 1993-11-25 Siemens Aktiengesellschaft Agencement de lames de contact de relais de transmission et de commutation de courants eleves
DE4309618A1 (de) * 1993-03-24 1994-09-29 Siemens Ag Polarisiertes elektromagnetisches Relais
US5587693A (en) * 1995-08-07 1996-12-24 Siemens Electromechanical Components, Inc. Polarized electromagnetic relay

Also Published As

Publication number Publication date
KR20000069919A (ko) 2000-11-25
BR9714520A (pt) 2000-05-09
CA2276751A1 (fr) 1998-07-16
JP2001508232A (ja) 2001-06-19
CN1123901C (zh) 2003-10-08
EP0950253A1 (fr) 1999-10-20
DE69709786T2 (de) 2002-06-20
TW442810B (en) 2001-06-23
CN1244291A (zh) 2000-02-09
DE69709786D1 (de) 2002-02-21
ES2167024T3 (es) 2002-05-01
EP0950253B1 (fr) 2001-11-21

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