EP1962316A1 - Elektromagnetisches Relais - Google Patents

Elektromagnetisches Relais Download PDF

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Publication number
EP1962316A1
EP1962316A1 EP07250727A EP07250727A EP1962316A1 EP 1962316 A1 EP1962316 A1 EP 1962316A1 EP 07250727 A EP07250727 A EP 07250727A EP 07250727 A EP07250727 A EP 07250727A EP 1962316 A1 EP1962316 A1 EP 1962316A1
Authority
EP
European Patent Office
Prior art keywords
plate
end portion
electromagnetic
conductive
actuating
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Withdrawn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
EP07250727A
Other languages
English (en)
French (fr)
Inventor
Te-Kang Wu
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.)
Good Sky Electric Co Ltd
Original Assignee
Good Sky Electric Co 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 Good Sky Electric Co Ltd filed Critical Good Sky Electric Co Ltd
Priority to EP07250727A priority Critical patent/EP1962316A1/de
Publication of EP1962316A1 publication Critical patent/EP1962316A1/de
Withdrawn legal-status Critical Current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
    • H01H50/54—Contact arrangements
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20—Bridging contacts
    • H01H1/2016—Bridging contacts in which the two contact pairs commutate at substantially different moments
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H01H50/541—Auxiliary contact devices
    • H01H50/543—Auxiliary switch inserting resistor during closure of contactor
    • 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
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/42—Impedances connected with contacts

Definitions

  • the invention relates to an electromagnetic device, more particularly to an electromagnetic relay.
  • Figures 1 and 2 illustrate a conventional electromagnetic relay 100 that includes: a base seat 11 having a bottom wall 110, an electromagnetic 12 mounted in the base seat 11 and having two ends opposite to each other in a direction (L) that is parallel to the bottom wall 110, and a set of coil strands wound around an iron core (not shown) about a center axis (X) of the iron core parallel to the direction (L); a magnetically attractable actuating plate 13 mounted movably in the base seat 11 and disposed adjacent to one of the ends of the electromagnetic 12; a resilient first conductive plate 15 mounted in the base seat 11 and disposed adjacent to the other one of the ends of the electromagnetic 12; a second conductive plate 14 mounted in the base seat 11 and distal from the electromagnetic 12; and a pushing plate 16 extending in the direction (L), and interconnecting the actuating plate 13 and the first conductive plate 15.
  • the electromagnetic 12 When the electromagnetic 12 is excited, the electromagnetic 12 generates a magnetic field in the direction (L) such that the actuating plate 13 is attracted to move toward the electromagnetic 12 so as to drive the first conductive plate 15 together with the pushing plate 16 to move toward and contact the second conductive plate 14, thereby activating the electromagnetic relay 100, as shown in Figure 3 .
  • the electromagnetic 12 since the coil strands are disposed about the axis (X) that is parallel to the bottom wall 110, the electromagnetic 12 has a relatively long length in the direction (L).
  • the actuating plate 13 and the first conductive plate 15 are disposed respectively adjacent to the opposite ends of the electromagnetic 12, the pushing plate 15 has a relatively long length in the direction (L).
  • the conventional electromagnetic relay 100 has a relatively long length in the direction (L), thereby resulting in a relatively large circuit footprint when installed on an external circuit board.
  • the object of the present invention is to provide an electromagnetic relay that can overcome the aforesaid drawbacks of the prior art.
  • an electromagnetic relay comprises:
  • the pushing block is driven by the actuating end portion of the actuating plate to move the first end portion of the first conductive plate toward the second end portion of the second conductive plate such that the first and third conductive contacts, firstly, contact electrically each other and, subsequently, that the second and fourth conductive contacts electrically contact each other.
  • an electromagnetic relay according to the present invention is shown to include a housing 1, a conductive plate unit 5, and a magnetic pushing device 4.
  • the housing 1 has a base seat 3, and a cover body 2 covering the base seat 3 and cooperating with the base seat 3 to define an inner accommodating space 21 (see Figure 6 ) therebetween.
  • the base seat 3 includes a bottom wall 31, and opposite mounting wall 32 extending uprightly from the bottom wall 31, spaced apart from each other in a first direction (A) and cooperating with the bottom wall 31 so as to define a receiving groove 33 (see Figure 5 ) thereamong.
  • each mounting wall 32 has a top end 321, a lateral side 320, an inner surface 322 formed with a guiding groove 323 that extends downwardly from the top end 321, and an engaging block 34 formed integrally on the lateral side 320.
  • the guiding groove 323 in each mounting wall 32 has an upwardly diverging end portion 3231 (see Figure 5 ).
  • the engaging block 34 of each mounting wall 32 has a vertical upper guiding face 341, a downwardly and outwardly inclined face 342 disposed immediately under the upper guiding face 341, and a horizontal bottom engaging face 343 disposed immediately under the inclined face 342, as shown in Figure 5 .
  • the conductive plate unit 5 is mounted on the base seat 3, is disposed distal from the lateral sides 320 of the mounting walls 32 of the base seat 3, and includes a first conductive plate 51 disposed adjacent to the mounting walls 32 of the base seat 3, and a second conductive plate 52, as shown in Figure 4 .
  • the first conductive plate 51 has a first terminal end portion 514 mounted fixedly on the bottom wall 31 of the base seat 3, a resilient first end portion 513, and first and second conductive contacts 511, 512 mounted fixedly on the first end portion 513, as shown in Figure 5 .
  • the first conductive plate 51 is formed with a first vertical slit 515 to divide the first end portion 513 into two sections mounted respectively with the first and second conductive contacts 511, 512.
  • the second conductive plate 52 is spaced apart from the first conductive plate 51 in a second direction (B) that is perpendicular to the first direction (A), and is distal from the mounting walls 32 of the base seat 3, as shown in Figure 4 .
  • the second conductive plate 52 has a second terminal end portion 524 mounted fixedly on the bottom wall 31 of the base seat 3, a resilient second end portion 523, and third and fourth conductive contacts 521, 522 mounted fixedly on the second end portion 523 and corresponding respectively to the first and second conductive contacts 511, 512 of the first conductive plate 51, as shown in Figure 5 .
  • the second conductive plate 52 is formed with a second vertical slit 525 to divide the second conductive-mounting end portion 523 into two sections mounted respectively with the third and fourth conductive contacts 521, 522.
  • the first vertical slit 515 having a length shorter than that of the second vertical slit 525.
  • a distance between the first and third conductive contacts 511, 521 is shorter than that between the second and fourth conductive contacts 512, 522, as best shown in Figure 9 .
  • the first and third conductive contacts 511, 521 are made of ferro-tungsten alloy having a higher melting point and a larger impedance
  • the second and fourth conductive contacts 512, 522 are made of silver alloy.
  • the magnetic pushing device 4 is disposed in the inner accommodating space 21, and includes an electromagnetic unit 41, a generally L-shaped actuating plate 42, a pushing block 43, and a biasing piece 44.
  • the electromagnetic unit 41 is mounted in the receiving groove 33 in the base seat 3.
  • the electromagnetic unit 41 is operable so as to generate a magnetic field in a third direction (C) that is perpendicular to the first and second directions (A, B), i.e., perpendicular to the bottom wall 31 of the base seat 3, when excited.
  • the electromagnetic unit 41 includes an electromagnetic-mounting seat 411, an iron core 413, a set of coil strands 412, and a metal anchoring plate 415.
  • the electromagnetic-mounting seat 411 has a lower plate portion 4111 defined with an inserting groove 4112, an upper plate portion 4113, and an intermediate tube portion 4114 interconnecting the upper plate portion 4113 and the lower plate portion 4111.
  • the lower plate portion 4111 has two lateral sidewalls 4115 opposite to each other in the first direction (A), and two resilient engaging arms 414 extending outwardly and respectively from the lateral sidewalls 4115.
  • Each of the resilient engaging arms 414 cooperates with a corresponding one of the lateral sidewalls 4115 to define a vertical guide slot 4116 therebetween.
  • the iron core 413 is disposed in the intermediate tube portion 4114 of the electromagnetic-mounting seat 411.
  • the iron core 413 has an enlarged bottom end 4131 that extends outwardly of the intermediate tube portion 4114 into the inserting groove 4112 in the lower plate portion 4111, as shown in Figure 6 .
  • the coil strands 412 are wound around the intermediate tube portion 4114 about a center axis (C1) of the intermediate tube portion 4114 of the electromagnetic-mounting seat 411 that is parallel to the third direction (C), as shown in Figure 6 .
  • the metal anchoring plate 415 is connected fixedly to the electromagnetic-mounting seat 411.
  • the metal anchoring plate 415 is an L-shaped plate having a horizontal plate portion 4153 that is connected fixedly to the upper plate portion 4113 of the electromagnetic-mounting seat 411, and a vertical plate portion 4151 that has opposite vertical sides 4152 guided respectively by the upwardly diverging end portions 3231 of the guiding grooves 323 to engage respectively the guiding grooves 323 in the inner surfaces 322 of the mounting walls 32 when the electromagnetic unit 41 is assembled to the base seat 3, and a bottom end 4154.
  • the actuating plate 42 is disposed pivotally in the receiving groove 33 in the base seat 3, and has a magnetically attractable end portion 421 inserted into the inserting groove 4112 in the lower plate portion 4111 of the electromagnetic-mounting seat 411 and disposed adjacent to the bottom end 4131 of the iron core 413 of the electromagnetic unit 41, an actuating end portion 422 opposite to the magnetically attractable end portion 421 and disposed movably adjacent to the vertical plate portion 4151 of the metal anchoring plate 415 of the electromagnetic unit 41, and an intermediate fulcrum portion 423 interconnecting the magnetically attractable end portion 421 and the actuating end portion 422 and abutting against the bottom end 4154 of the vertical plate portion 4151 of the metal anchoring plate 415, as shown in Figure 5 , such that the magnetically attractable end portion 421 and the actuating end portion 422 are pivotable about the intermediate fulcrumportion 423.
  • the actuating plate 42 is operable so as to pivot between a pushing position, where the magnetically attractable end portion 421 is attracted to abut against the bottom end 4131 of the iron core 413 as a result of the magnetic field generated by the electromagnetic unit 41 when excited and where the actuating end portion 422 moves toward the first conductive plate 51, and a releasing position, as shown in Figure 6 , where the magnetically attractable end portion 421 is spaced apart from the bottom end 4131 of the iron core 431 when the electromagnetic unit 41 is not excited and where the actuating end portion 422 moves away from the first conductive plate 51.
  • the actuating end portion 422 is formed with two engaging holes 425 opposite to each other in the first direction (A).
  • the pushing block 43 interconnects the actuating end portion 422 of the actuating plate 42 and the first end portion 513 of the first conductive plate 51.
  • the pushing block 43 has a first end portion 430 formed with two protrusions 431 engaging respectively the engaging holes 425 in the actuating end portion 422 of the actuating plate 42, and a second end portion 432 opposite to the first end portion 430 in the second direction (B), abutting against the first end portion 513 of the first conductive plate 51 and having an engaging rod 433 extending through the first end portion 513 of the first conductive plate 51, as shown in Figure 4 .
  • the biasing piece 44 biases the actuating plate 42 to the releasing position.
  • the biasing piece 44 has a base plate 441 having opposite sides that engage respectively inserting grooves 416 in the sidewalls 4115 of the lower plate portion 4111 of the electromagnetic-mounting seat 411, and a resilient upwardly extending biasing plate 442 connected integrally to the base plate 42 and abutting against the intermediate fulcrum portion 423 of the actuating plate 42.
  • the guide slots 4116 in the lower plate portion 4111 of the electromagnetic-mounting seat 411 engage respectively the engaging blocks 34 of the mounting walls 32 of the base seat 3 such that the engaging arms 414 of the lower plate portion 4111 of the electromagnetic-mounting seat 411 slide downwardly and respectively on and are guided respectively by the upper guiding faces 341 and the inclined faces 342 of the engaging blocks 34 of the mounting walls 34 to two positions located immediately and respectively under the bottom engaging faces 343 of the engaging blocks 34 so as to prevent movement of the assembly of the electromagnetic unit 41, the actuating plate 42 and the biasing piece 44 relative to the mounting walls 32.
  • the pushing block 43 is driven by the actuating end portion 422 of the actuating plate 42 to move the first end portion 513 of the first conductive plate 51 toward the second end portion 523 of the second conductive plate 52 such that the first and third conductive contacts 511, 521, firstly, contact electrically each other (see Figure 10 ) and, subsequently, that the second and fourth conductive contacts 512, 522 electrically contact each other (see Figure 11 ).
  • first and third conductive contacts 511, 521 due to the high melting point property of the first and third conductive contacts 511, 521, melting deformation in part or carbonization of the first and third conductive contacts 511, 521 resulting from arc generated instantaneously upon contacting the first conductive contact 511 with the third conductive contact 521 can be avoided. Due to the high impedance property of the first and third conductive contacts 511, 521, a surge current generated instantaneously upon contacting the first conductive contact 511 with the third conductive contact 521 can be eliminated. On the other hand, since the second and fourth conductive contacts 512, 522 are made of silver alloy, a good conductivity can be obtained.
  • the first end portion 513 of the first conductive plate 51 moves away from the second end portion 523 of the second conductive plate 52 due to a restoration force thereof such that the first and second conductive 511, 512 are spaced respectively apart from the third and fourth conductive contacts 521, 522.
  • the electromagnetic unit 41 since the coil strands of the electromagnetic unit 41 are disposed about the central axis (Cl) that is perpendicular to the bottom wall 31 of the base seat 3, the electromagnetic unit 41 has a relatively small width in the second direction (B). Since the pushing block 43 and the first conductive plate 51 are disposed adjacent to the same side of the electromagnetic unit 41 in the second direction (B), the pushing block 43 has a relatively short length in the second direction (B). As a result, the electromagnetic relay of the present invention has a relatively short length in the second direction (B), thereby resulting in a relatively small circuit footprint when installed on an external circuit board.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
EP07250727A 2007-02-21 2007-02-21 Elektromagnetisches Relais Withdrawn EP1962316A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07250727A EP1962316A1 (de) 2007-02-21 2007-02-21 Elektromagnetisches Relais

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07250727A EP1962316A1 (de) 2007-02-21 2007-02-21 Elektromagnetisches Relais

Publications (1)

Publication Number Publication Date
EP1962316A1 true EP1962316A1 (de) 2008-08-27

Family

ID=38093043

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07250727A Withdrawn EP1962316A1 (de) 2007-02-21 2007-02-21 Elektromagnetisches Relais

Country Status (1)

Country Link
EP (1) EP1962316A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104282493A (zh) * 2013-07-01 2015-01-14 富士通电子零件有限公司 电磁继电器
US10879023B1 (en) * 2019-06-12 2020-12-29 Landis+Gyr Innovations, Inc. Progressively contacting switch

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB342497A (en) * 1930-01-16 1931-02-05 Coventry Autom Telephones Ltd Improvements in or relating to electric contact making relays
US2341931A (en) * 1941-04-24 1944-02-15 Gen Electric Circuit maker and breaker
DE3808558A1 (de) * 1987-03-20 1988-09-29 Matsushita Electric Works Ltd Elektrisches relais mit schwenkbarem anker
DE3841667C1 (de) * 1988-12-10 1990-02-01 Robert Bosch Gmbh, 7000 Stuttgart, De
JPH04248213A (ja) * 1991-01-23 1992-09-03 Matsushita Electric Works Ltd 接点開閉装置
DE9117155U1 (de) * 1991-05-08 1996-08-29 Eberle Controls GmbH, 90491 Nürnberg Elektromagnetisches Schaltrelais für Leiterplattenmontage

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB342497A (en) * 1930-01-16 1931-02-05 Coventry Autom Telephones Ltd Improvements in or relating to electric contact making relays
US2341931A (en) * 1941-04-24 1944-02-15 Gen Electric Circuit maker and breaker
DE3808558A1 (de) * 1987-03-20 1988-09-29 Matsushita Electric Works Ltd Elektrisches relais mit schwenkbarem anker
DE3841667C1 (de) * 1988-12-10 1990-02-01 Robert Bosch Gmbh, 7000 Stuttgart, De
JPH04248213A (ja) * 1991-01-23 1992-09-03 Matsushita Electric Works Ltd 接点開閉装置
DE9117155U1 (de) * 1991-05-08 1996-08-29 Eberle Controls GmbH, 90491 Nürnberg Elektromagnetisches Schaltrelais für Leiterplattenmontage

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104282493A (zh) * 2013-07-01 2015-01-14 富士通电子零件有限公司 电磁继电器
CN104282493B (zh) * 2013-07-01 2019-03-08 富士通电子零件有限公司 电磁继电器
US10879023B1 (en) * 2019-06-12 2020-12-29 Landis+Gyr Innovations, Inc. Progressively contacting switch
CN114207758A (zh) * 2019-06-12 2022-03-18 兰迪斯+盖尔创新有限公司 渐进接触开关

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