EP0853325A1 - Elektromagnetisches Relais - Google Patents

Elektromagnetisches Relais Download PDF

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Publication number
EP0853325A1
EP0853325A1 EP98100320A EP98100320A EP0853325A1 EP 0853325 A1 EP0853325 A1 EP 0853325A1 EP 98100320 A EP98100320 A EP 98100320A EP 98100320 A EP98100320 A EP 98100320A EP 0853325 A1 EP0853325 A1 EP 0853325A1
Authority
EP
European Patent Office
Prior art keywords
base
electromagnetic relay
electromagnetic
relay
wall
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.)
Granted
Application number
EP98100320A
Other languages
English (en)
French (fr)
Other versions
EP0853325B1 (de
Inventor
Yutaka Uno
Hiroaki Yamasaki
Kiyoaki Kuzukawa
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.)
Omron Corp
Original Assignee
Omron Corp
Omron Tateisi Electronics Co
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 Omron Corp, Omron Tateisi Electronics Co filed Critical Omron Corp
Publication of EP0853325A1 publication Critical patent/EP0853325A1/de
Application granted granted Critical
Publication of EP0853325B1 publication Critical patent/EP0853325B1/de
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
    • 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
    • H01H50/00—Details of electromagnetic relays
    • H01H50/02—Bases; Casings; Covers
    • H01H50/026—Details concerning isolation between driving and switching circuit
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/64—Driving arrangements between movable part of magnetic circuit and contact
    • H01H50/641—Driving arrangements between movable part of magnetic circuit and contact intermediate part performing a rectilinear movement
    • H01H50/642—Driving arrangements between movable part of magnetic circuit and contact intermediate part performing a rectilinear movement intermediate part being generally a slide plate, e.g. a card

Definitions

  • the invention generally relates to electromagnetic relays. More specifically, it relates to a slender electromagnetic relay with a high degree of isolation yet occupies a small surface area.
  • an electromagnetic block is inserted in an axial direction through an opening in a sleevelike base.
  • the base is formed of molded resin, and one of its ends is closed.
  • Contact mechanism is placed at the other end of the base.
  • This type of electromagnetic relay requires that the base be sleeve-shaped so that it can encase a coil in the block. This, however, tends to increase the thickness of the relay. If one wishes to design a slender electromagnetic relay which occupies a small surface area, for example, one that is less than 5 mm wide, the space in which the coil is wound must be made smaller, with the result that the appropriate length of coil cannot be wound and the desired pull cannot be achieved. In addition, production of a sleeve-shaped base for such a relay requires that a side core be used as the mold. This drives up the coat of producing a sleeve-shaped base.
  • Japanese 1-302631 discloses a core and an armature both consisting of flat plates. It further teaches stacking a fixed leaf spring and a movable leaf spring on top of the armature, and enclosing the leaf springs within the core.
  • the object of the invention is to provide a slender electromagnetic relay with a small surface area and which offers a high degree of isolation.
  • the electromagnetic relay relating to the invention is designed as follows.
  • an electromagnetic relay in which a card is moved back and forth by a movable member which itself rotates with the magnetization and demagnetization of an electromagnetic block, and in which the movement of the card drives a contact mechanism, the electromagnetic block and the contact mechanism are sandwiched between two base portions, the first of which is segmented into two parts along its width.
  • a groove is provided for the purpose of isolation on one of the opposing surfaces of the two base portions, and a tongue which engages with the groove is provided on the other opposing surface.
  • the front of the groove should be shaped like the letter “L” or the letter “T”.
  • the movable and fixed contact elements which constitute the contact mechanism should be sandwiched between the two base portions, and a second groove should be provided on one of the opposing surfaces of the two base portions between the bottoms of the movable and fixed contact members.
  • a second tongue for engaging in this groove should be provided on the other opposing surface.
  • the front of the second tongue should also be shaped like the letter “L” or the letter "T".
  • the base of the relay should be formed from the two base portions, one of which should engage elastically with the other.
  • Figure 1 is an exploded perspective drawing of an electromagnetic relay which is an ideal embodiment of this invention.
  • Figure 2 is an exploded perspective drawing which illustrates how the block of the relay shown in Figure 1 is assembled.
  • Figure 3 is an exploded front view which illustrates how the block of the relay shown in Figure 1 is assembled.
  • Figure 4 is a front view of the block after the assembly process shown in Figure 3 is completed.
  • Figure 5 is an exploded perspective drawing which illustrates from a different angle how the block of the relay shown in Figure 1 is assembled.
  • Figure 6(a) is a perspective drawing of the movable member of the relay in Figure 1 with the hinged spring attached to it; and Figure 6(b) is a perspective drawing of the movable member of the relay in Figure 1 by itself.
  • Figure 7(a) is a perspective drawing of the hinged spring shown in Figure 1; and Figure 7(b) is a perspective drawing of a modified version of the same hinge.
  • Figure 8 is a perspective drawing which illustrates how the second base portion of the relay pictured in Figure 1 is assembled.
  • Figure 9 is an exploded front view which illustrates how the two base portions pictured in Figure 1 engage with each other.
  • Figure 10 is an exploded front view from another angle, which illustrates how the second base portion pictured in Figure 1 is assembled.
  • Figure 11 is an exploded perspective view which illustrates how the card in the relay shown in Figure 1 is assembled.
  • Figure 12 is a front view of the electromagnetic relay shown in Figure 1 once the card has been attached.
  • Figure 13(a) is an exploded view from underneath the relay of Figure 1 when it is partly assembled;
  • Figure 13(b) shows the relay of Figure 1 once assembly is completed;
  • Figure 13(c) is a view of the underside of the relay of Figure 1 once the case has been mounted.
  • the electromagnetic relay of this embodiment consists of base 10, comprising two base portions 20 and 60 which can engage or disengage with each other along the axis of the width; contact mechanism 30; electromagnetic block 40; movable member 50; card 70; and case 80.
  • structure 22 which serves to isolate two halves of the base portion 20.
  • lateral walls 23 and 24 On either side of this structure are lateral walls 23 and 24.
  • recess 22a In the center of the structure 22 is recess 22a, which separates contact mechanism 30 from electromagnetic block 40. There is a depression 22b on one of the outer surfaces of the structure 22; on the other outer surface there is an L-shaped boss 22c. On top of the structure 22 is a boss 22d which serves to maintain the base in the proper position.
  • a small projection 25a (see Figure 2), which serves to lock the two base portions together, and a small groove 26a, into which one of the contact elements fits.
  • a recess 23a At the base of the interior surface of the lateral wall 23 are a recess 23a to enhance isolation and a small groove 26b, into which the other contact element fits.
  • a depression 27 Between the structure 22 and lateral wall 24 is a depression 27 to accommodate the movable member.
  • a shallow groove 27a At the bottom of depression 27 is a shallow groove 27a.
  • a hole 21a (see Figure 2) for the purpose of keeping the base in the proper position.
  • a slit 28 at the bottom end of the lateral wall 24 goes along the axis of the width; the opposite base portion will be pressed into this slit.
  • On the upper surface of slit 28 is a groove 28a which guides the position of the opposite base portion. See Figure 3.
  • Contact mechanism 30 comprises fixed contact element 31 and movable contact element 35. See Figure 2.
  • Fixed contact element 31 is formed by bending a thin plate of conductive material.
  • Fixed contact 32 is on its upper end and terminal 33 is attached to its lower end.
  • movable contact element 35 is formed from a thin plate of conductive material.
  • On its upper end is a mounting hole 36.
  • Below hole 36 is movable contact 37.
  • Terminal 38 is attached to the element below contact 37.
  • fixed contact 32 and movable contact 37 face each other so that contact can be made and broken.
  • Electromagnetic block 40 has a coil 43 which is wound around spool 42.
  • the spool 42 is inserted into an L-shaped core 41.
  • the ends of the wire which are drawn out of the coil 43 are tied and soldered to posts 44a and 45a on coil terminals 44 and 45, respectively.
  • the terminals are pressed into flange 42a on the spool 42.
  • On the horizontal extremity 41a of the core 41 are two projections 41b.
  • An L-shaped yoke 46 is caulked to the upper end of core 41 which projects beyond flange 42 on the spool 42.
  • On the lower end of the vertical portion of yoke 46 are two projections, 46a (see Figure 2) and 46b, which extend along the width of the yoke 46.
  • movable member 50 is made of a magnetic material whose lengthwise cross section has the form of a pole.
  • main unit 51 On one end of its main unit 51 is a narrow neck 52 with a T-shaped top.
  • Neck 52 is pressed sideward so as to form an overhang which projects beyond the edge of unit 51 by a distance of 52a.
  • Neck 52 has approximately the same thickness as main unit 51.
  • the base of the neck 52 has a tapered undersurface 53. This eliminates the need to bend neck 52 at a right angle along the axis of its width and, as such, makes the component easier to produce.
  • Hinged spring 55 is caulked to the movable member 50. As can be seen in Figure 7 (a), this spring has two caulking holes 58 on the upper end of fixed element 57, which is shaped like an archway.
  • Elastic element 56 is formed by stamping out a portion of fixed element 57. The lower portion of element 57 is bent at a right angle. The elastic element 56 is bent at an obtuse angle.
  • Projections 54 on the movable member 50 engages in caulking holes 58 in hinged spring 55.
  • movable member 50 is supported by hinged spring 55 in such a way as to be held slightly away from it.
  • the hinged spring 55 is not limited to the shape discussed above, however. It could also have caulking holes 58 in a fixed element 57 which is cut out of the elastic element and bent at a right angle. See Figure 7(b). The arch-shaped elastic element 56 would then be bent at an obtuse angle.
  • the spring material is cut out to form the elastic and fixed elements. This keeps material loss to a minimum.
  • Movable member 50 is inserted into depression 27 in the base portion 20.
  • the hinged spring 55 When the hinged spring 55 is held in position by groove 27a, the lower end of movable member 50 is in contact with the surface of extremity 41a of core 41. See Figure 8.
  • the horizontal end of hinged spring 55 is stopped when it comes up against extremity 41a of core 41.
  • the upper end of elastic element 56 is stopped when it engages with projection 22c. In this way, the position of movable member 50 is controlled both above and below.
  • a base portion 60 which is formed from molded resin, and consists of front wall 61.
  • This wall 61 is identical in shape to front wall 21 of the base portion 20.
  • a projecting wall 62 In the part of the base portion 60 which corresponds to recess 22a in the base portion 20, there is a projecting wall 62.
  • On the left and right sides of the front wall project arms 63 and 64, which engage elastically with projections 25a and 25b.
  • the wall 62 has an L-shaped front. This prevents dielectric breakdown between the engaged surfaces of base portions 20 and 60, and it increases the isolation distance.
  • T-shaped projecting wall 65 and boss 66 which correspond to the recess 23a and depression 22b, respectively.
  • projection 67 which juts out from wall surface 61. Along with projection 22c on the structure 22, this projection 67 serves to stop elastic element 56 of hinged spring 55. See Figure 12. In the part of front wall 61 which corresponds to hole 21a in the front wall 21 is positioning hole 61a. See Figure 10.
  • contact mechanism 30 is segregated from electromagnetic block 40 and movable member 50 by L-shaped wall 62 on base portion 60, and a long isolation distance is maintained.
  • the base of fixed contact element 31 is segregated from the base of movable contact element 35 by T-shaped wall 65, which further increases the isolation distance and improves the isolation characteristics.
  • Lower surface portion 11, which consists of the bottoms of base portions 20 and 60 and the outer walls of flange 42a on electromagnetic block 40, has an entirely level surface. This makes it easier to apply the sealant.
  • a card 70 which is a flat component of molded resin with two holes, 71 and 72, on its ends.
  • a boss 73 on its lower surface serves to position the card correctly. From one edge of hole 71, a tooth 74 projects toward the center of the card to anchor the card to the relay. Half of the other hole, hole 72, is narrowed to form a stop.
  • case 80 is made of resin molded in the shape of a box. It encloses base 10, which is formed by attaching base portions 20 and 60, and electromagnetic block 40.
  • base portions 20 and 60 and electromagnetic block 40 engage with case 80.
  • a sealant (not shown) is then applied to lower surface portion 11. When it hardens, the relay is sealed. Any interior gases are removed via hole 81 on the upper surface of case 80. The relay is then heat-sealed, and the assembly process is completed.
  • base portion 20 has two recesses in its central region to enhance isolation, 22a and 23a, and we have discussed walls 62 and 65 in the central region of base 60.
  • the design of the isolation devices is not limited to this case only. The same walls could just as well be provided on the opposite base portion.
  • the electromagnetic relay related to the invention has a wall which engages in a groove between the contact mechanism and the electromagnetic block. This segregates and electrically isolates the two halves of the relay. This design allows realization of an electromagnetic relay whose isolation characteristics are superior to those of previous relays and which is easier to produce.
  • the internal components may be positioned in one of the base portions before the other portion is attached to it. This design allows us to achieve a slender electromagnetic relay with a small surface area, and which is nevertheless easily assembled and which contributes to high productivity.
  • the base is divided into two separable portions, the base portions are easier to form. Unlike its predecessors, this relay does not require a complicated side core be used as the mold, so its production cost is lower.
  • the isolation distance between the base of the movable contact element and that of the fixed contact element is increased by the presence of a wall which engages in a groove. This further improves the isolation characteristics.
  • the two base portions can be separated or attached along the axis of the width. This makes it easier to attach the base portions to each other and allows us to achieve a relay which enhances productivity.
  • the hinged spring can be made more efficiently.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
  • Switch Cases, Indication, And Locking (AREA)
EP19980100320 1997-01-09 1998-01-09 Elektromagnetisches Relais Expired - Lifetime EP0853325B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP1890/97 1997-01-09
JP00189097A JP3826464B2 (ja) 1997-01-09 1997-01-09 電磁継電器
JP189097 1997-01-09

Publications (2)

Publication Number Publication Date
EP0853325A1 true EP0853325A1 (de) 1998-07-15
EP0853325B1 EP0853325B1 (de) 1999-08-04

Family

ID=11514187

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19980100320 Expired - Lifetime EP0853325B1 (de) 1997-01-09 1998-01-09 Elektromagnetisches Relais

Country Status (3)

Country Link
EP (1) EP0853325B1 (de)
JP (1) JP3826464B2 (de)
DE (1) DE69800013T2 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19833960C1 (de) * 1998-07-28 2000-04-13 Euro Matsushita Electric Works Schmales elektromagnetisches Relais
EP1420428A1 (de) * 2002-11-12 2004-05-19 Omron Corporation Elektromagnetisches Relais
EP1744340A1 (de) * 2005-07-16 2007-01-17 TYCO Electronics Austria GmbH Relais und Herstellungsverfahren
CN101740270B (zh) * 2008-11-18 2012-06-27 国兴电工股份有限公司 电磁继电器

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4316164A (en) * 1979-03-30 1982-02-16 Siemens Aktiengesellschaft Electromagnetic relay with snap-in yoke
DE3835105A1 (de) * 1988-01-26 1989-08-03 Fuji Electric Co Ltd Elektromagnetisches relais
EP0727800A2 (de) * 1995-02-15 1996-08-21 Matsushita Electric Works, Ltd. Elektromagnetisches Relais

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4316164A (en) * 1979-03-30 1982-02-16 Siemens Aktiengesellschaft Electromagnetic relay with snap-in yoke
DE3835105A1 (de) * 1988-01-26 1989-08-03 Fuji Electric Co Ltd Elektromagnetisches relais
EP0727800A2 (de) * 1995-02-15 1996-08-21 Matsushita Electric Works, Ltd. Elektromagnetisches Relais

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19833960C1 (de) * 1998-07-28 2000-04-13 Euro Matsushita Electric Works Schmales elektromagnetisches Relais
EP1420428A1 (de) * 2002-11-12 2004-05-19 Omron Corporation Elektromagnetisches Relais
EP1744340A1 (de) * 2005-07-16 2007-01-17 TYCO Electronics Austria GmbH Relais und Herstellungsverfahren
CN101740270B (zh) * 2008-11-18 2012-06-27 国兴电工股份有限公司 电磁继电器

Also Published As

Publication number Publication date
EP0853325B1 (de) 1999-08-04
JPH10199386A (ja) 1998-07-31
DE69800013T2 (de) 2000-04-06
JP3826464B2 (ja) 2006-09-27
DE69800013D1 (de) 1999-09-09

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