US3747035A - Electromagnetic relay - Google Patents

Electromagnetic relay Download PDF

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Publication number
US3747035A
US3747035A US00241970A US3747035DA US3747035A US 3747035 A US3747035 A US 3747035A US 00241970 A US00241970 A US 00241970A US 3747035D A US3747035D A US 3747035DA US 3747035 A US3747035 A US 3747035A
Authority
US
United States
Prior art keywords
auxiliary
contact
armature
fixed
movable contact
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 - Lifetime
Application number
US00241970A
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English (en)
Inventor
I Morimoto
H Fujimoto
K Yamada
K Hisano
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Application granted granted Critical
Publication of US3747035A publication Critical patent/US3747035A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H36/00—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
    • 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
    • H01H50/041—Details concerning assembly of relays
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements

Definitions

  • Main contact block includes an electromagnet device and an armature pivotably engaged to an end of yoke and having an insulator base fixed to one side of the armature and a movable contact spring secured to said insulator base.
  • Auxiliary contact block comprises an insulator plate, an auxiliary movable contact spring fixed at an end to said insulator plate, at least an auxiliary movable contact fixed to the other free end of said auxiliary movable contact spring, and at least an auxiliary fixed contact fixed to said insulator plate so as to oppose said auxiliary movable contact.
  • the two blocks are fitted in a covering means adapted to hold them in positions, in which said auxiliary movable contact spring of the auxiliary contact block is driven through said insulator base of the armature of the main contact block upon attraction of the armature.
  • the electromagnet of the main contact block has an auxiliary iron core provided in contact with a central axial iron core and disposed in a space in a frame of bobbin, and a permanent magnet provided in contact with said auxiliary iron core. The electromagnetis in contact with the yoke on the side of said permanent magnet.
  • the present invention has been suggested to eliminate the above mentionedde'fects.
  • A'principal object of the present invention is, therefore, to provide an improved electromagnetic relay having main contacts and "auxiliary contacts and of small type.
  • Another object of thepresent invention is to provide an electromagnetic relay which is easy to adjust and assembles.
  • I A further'objectof the present invention is to provide an electromagn'etic relay wherein the' electromagnetic device is easy to design.
  • FIG. 1 is a perspective view of an embodiment of the electromagnetic relay according to the present invention as disassembled.
  • FIG. 2 is an elevation of 'the same with the cover removed in assembling it.
  • FIG. 3 is a side view of the same.
  • FIG. 4 is a perspective view as disassembled of an electromagnetic device utilized in the embodiment.
  • FIGS. 5A and 5B are explanatory views of the operation of the same.
  • l is an electromagnet formed by fitting a bobbin around a iron core, winding a coil on this bobbin and molding the entirety except both end surfaces with a synthetic resin.
  • 2 is a substantially L-shaped yoke having an armature 4 pivotably engaged to extensions 3 provided at both side edges of one side bent edge, so that the armature body will oppose an end of the iron core of the electromagnet.
  • 5 is a coil spring engaged at an end to a projection 6 provided on said bent of the yoke 2 to which the armature is engaged and at the other end to an extended end 7 of the armature 4.
  • the electromagnet 1 is assembled in the L-shaped yoke 2 by being pushed in from any open side of the yoke.
  • a terminal base supporting main fixed contacts made of a synthetic resin and having L-shaped fixed contactor arms 12 integrally provided at the lower part of the base 11 and fixed contacts 13 provided on said fixed contactor arms l2.
  • 14 is a terminal screw for the respective main fixed contacts.
  • 15 is a recess in which on side wall of the yoke 2 is fitted.
  • 16 is a through hole made in the recess.
  • 19' is an auxiliary contact part having auxiliary movable contacts and fixed contacts, wherein L-shaped terminal plates 21 are fixed to one end part of an insulator plate 20.
  • 22 is a threaded hole provided in the respective terminal plates.
  • 23 is. a screw to be screwed into each of said threadedholes.
  • 24 is an auxiliary movable contactor arm, riveted at one end to the insulator plate 20 adjacent the terminal plates 21 and disposed at the other end between upper and lower auxiliary fixed contacts 25 and 26.
  • 27 and 28 are fixed contact plates supporting respectively said contacts 25 and 26 and fixed to the insulator plate 20. 29 is a diode secured to the insulating plate.
  • '30 is a supporting frame made of a synthetic resin, formed to be substantially in U-shape, provided in the top part of one side wall 31 with supporting sections 33 having holes 32 for inserting conductive wires and provided in the other side wall with apertures 34.
  • 36 and 37 are cover members made of a synthetic resin and provided with inside spaces 38 and 39.
  • FIG. 2 shows an elevation of the whole assembly with one cover member 37 removed.
  • FIG. 3 shows one side view thereof, wherein 40 is an abutting line of the cover members 36 and 37.
  • FIG. 4 shows in a perspective view the electromagnet device of the embodiment in FIG. 1 with the respective components disassembled.
  • an iron core (not illustrated) is inserted in the center of a bobbin 41 and an auxiliary iron core 44 of a disk shape is inserted in a circular space 43 in the center of an upper bobbin frame part 42 and is fixed to the iron core (not illustrated).
  • 45 is a permanent magnet kept in contact with the auxiliary iron core 44 and contained in the space 43.
  • a coil (not illustrated) is wound on the bobbin 41.
  • FIG. A shows the state in which the armature 4 is not attracted. If distances between the armature 4 and the head part of the iron core 46 and between the auxiliary iron core 44 and the inside wall of the yoke 2 are represented by d, and (1,, respectively, when the armature is not attracted, the relation between these distances will be d d,. Therefore, the magnetic fiux from the permanent magnet 45 will flow mostly from the permanent magnet through the auxiliary iron core to the yoke and back to the permanent magnet, and
  • the distance d is so little influenced by the permanent magnet that the armature 4 can be attracted by only flowing a slight electric current through the coil
  • the magnetic flux from the'permanent magnet will flow from the permanent magnet through the auxiliary iron core and the iron core to the armature and then to the yoke, and back to the permanent magnet. Therefore, the armature will be strongly attracted by both of the magnetic flux due to the electric current'flowing through the coil and the magnetic flux by the permanent magnet.
  • the operation of the electromagnetic relay of the present invention itself shall be explained.
  • the main movable contact 8 When an electric current is caused to flow through the coil and thus the armature is attracted bythe electromagnet, the main movable contact 8 will separate from the main fixed contact 13 with the movement of the armature.
  • the insulator base fixed to the armature will also move to the iron core side and, therefore, the auxiliary contactor arm 24 will also move at the tip to the electromagnet side and the auxiliary movable contact will become ON with the auxiliary fixed contact 25 while the same will become OFF with the other auxiliary fixed contact 26.
  • the relay can be minimized in size even though the relay includes the main contacts and auxiliary contacts.
  • each block can be separately assembled and adjusted and, therefore, the assembling efficiency can be improved.
  • the armature can be operated by flowing only a small amount of electric current to the coil and, therefore, the design of the coil can be made easy.
  • An electromagnetic relay comprising a main contact block comprising a substantially L-shaped yoke, an
  • armature pivotably engaged to an extended end of a bent of said yoke and having an insulator base fixed to one side thereof, a main movable contact spring secured to said insulator base of the armature, an electromagnet disposed between the other side of said armature and the other bent of said yoke, said electromagnet comprising a bobbin having a flange at one end of a cylindrical body and a frame at the other end, an iron core provided in a central axial space of said cylindrical body of the bobbin, an auxiliary iron core provided in contact with said iron core and disposed in a space in said frame of the bobbin, and a permanent magnet provided in contact with said auxiliary iron core, said electromagnet being in contact with the yoke on the side of said permanent magnet; an auxiliary contact block comprising an insulator plate, an auxiliary movable contact spring fixed at an end to said insulator plate, at least an auxiliary movable contact fixed to the other free end of said auxiliary movable contact

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
US00241970A 1971-04-21 1972-04-07 Electromagnetic relay Expired - Lifetime US3747035A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP46025799A JPS5247545B1 (enrdf_load_stackoverflow) 1971-04-21 1971-04-21

Publications (1)

Publication Number Publication Date
US3747035A true US3747035A (en) 1973-07-17

Family

ID=12175882

Family Applications (1)

Application Number Title Priority Date Filing Date
US00241970A Expired - Lifetime US3747035A (en) 1971-04-21 1972-04-07 Electromagnetic relay

Country Status (3)

Country Link
US (1) US3747035A (enrdf_load_stackoverflow)
JP (1) JPS5247545B1 (enrdf_load_stackoverflow)
CA (1) CA957411A (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4075586A (en) * 1975-02-24 1978-02-21 Matsushita Electric Works, Ltd. Electromagnetic relay
FR2484693A1 (fr) * 1980-06-13 1981-12-18 Telemecanique Electrique Appareil de commutation modulaire
EP0186393A3 (en) * 1984-12-24 1987-03-11 Matsushita Electric Works, Ltd. Remotely controllable relay
US20140055223A1 (en) * 2012-08-24 2014-02-27 Omron Corporation Electromagnet device, method of assembling the same, and electromagnetic relay using the same
US20160379785A1 (en) * 2014-03-11 2016-12-29 Tyco Electronics Austria Gmbh Electromagnetic Relay

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3209095A (en) * 1961-12-01 1965-09-28 Guardian Electric Mfg Co Spring-biased clapper type industrial power relay
US3569890A (en) * 1967-12-29 1971-03-09 Ezio Barateili Bistable magnetic latching relay
US3626339A (en) * 1970-04-20 1971-12-07 Heinemann Electric Co Electromagnetic relay

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3209095A (en) * 1961-12-01 1965-09-28 Guardian Electric Mfg Co Spring-biased clapper type industrial power relay
US3569890A (en) * 1967-12-29 1971-03-09 Ezio Barateili Bistable magnetic latching relay
US3626339A (en) * 1970-04-20 1971-12-07 Heinemann Electric Co Electromagnetic relay

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4075586A (en) * 1975-02-24 1978-02-21 Matsushita Electric Works, Ltd. Electromagnetic relay
FR2484693A1 (fr) * 1980-06-13 1981-12-18 Telemecanique Electrique Appareil de commutation modulaire
EP0186393A3 (en) * 1984-12-24 1987-03-11 Matsushita Electric Works, Ltd. Remotely controllable relay
US20140055223A1 (en) * 2012-08-24 2014-02-27 Omron Corporation Electromagnet device, method of assembling the same, and electromagnetic relay using the same
CN103632888A (zh) * 2012-08-24 2014-03-12 欧姆龙株式会社 电磁装置、其安装方法及使用该电磁装置的电磁继电器
US9070501B2 (en) * 2012-08-24 2015-06-30 Omron Corporation Electromagnet device, method of assembling the same, and electromagnetic relay using the same
CN103632888B (zh) * 2012-08-24 2016-05-18 欧姆龙株式会社 电磁装置、其安装方法及使用该电磁装置的电磁继电器
US20160379785A1 (en) * 2014-03-11 2016-12-29 Tyco Electronics Austria Gmbh Electromagnetic Relay
US10541098B2 (en) * 2014-03-11 2020-01-21 Tyco Electronics Austria Gmbh Electromagnetic relay

Also Published As

Publication number Publication date
JPS5247545B1 (enrdf_load_stackoverflow) 1977-12-03
CA957411A (en) 1974-11-05

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