US3800250A - Electromagnetic relay - Google Patents

Electromagnetic relay Download PDF

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Publication number
US3800250A
US3800250A US00284136A US28413672A US3800250A US 3800250 A US3800250 A US 3800250A US 00284136 A US00284136 A US 00284136A US 28413672 A US28413672 A US 28413672A US 3800250 A US3800250 A US 3800250A
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US
United States
Prior art keywords
armature
spring
electromagnetic relay
core
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
US00284136A
Other languages
English (en)
Inventor
T Mori
T Yuda
K Okahashi
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 US3800250A publication Critical patent/US3800250A/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
    • H01H50/00—Details of electromagnetic relays
    • H01H50/64—Driving arrangements between movable part of magnetic circuit and contact
    • H01H50/645—Driving arrangements between movable part of magnetic circuit and contact intermediate part making a resilient or flexible connection
    • 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
    • H01H50/042—Different parts are assembled by insertion without extra mounting facilities like screws, in an isolated mounting part, e.g. stack mounting on a coil-support
    • 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
    • H01H50/26—Parts movable about a knife edge
    • 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
    • H01H50/34—Means for adjusting limits of movement; Mechanical means for adjusting returning force
    • 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

Definitions

  • ABSTRACT Foreign Apphcatmn Prmmy Data Electromagnetic relay having a balancing spring for Sept. 1, 1971 Japan 46-67703 the armature and engaged between an end of the an mature and a stationary part of the electromagnetic [52] Cl 335/128 335/135 335/192 device so that as the armature is attracted toward the 51 l I 335/274 core of electromagnetic device the force of said balancing p g be reduced and entire p g load 1 0 care 3 characteristic will be kept small.
  • a balancing spring for a conventional electromagnetic relay has been used to have a gradient in the direction of increasing the elasticity of the balancing spring as thearmature is attracted, it has been necessary to increase the electromagnetic attraction that much and to necessarily enlarge the electromagnetic device. Therefore, it has been difficult to make the electromagnetic relay small.
  • a balancing spring is used to have a gradient reverse to that of a conventional one so that the electromagnet may be small and therefore the problem of making the entire structure of the electromagnetic relay small may be solved.
  • a mainobject of the present invention is to make a magnetic relay small by using a balancing spring so as to have a gradient reverse to that ofa conventional one.
  • Another object of the present invention is to simply and cheaply provide an electromagnetic relay wherein the balancing spring characteristic can be regulated.
  • a further object of the present invention is to provide an electromagnetic relay wherein the chattering of contacts is reduced by reducing the energy of the total spring loads.
  • Another object of the present invention is to provide an electromagnetic relay which having a high sensitivity.
  • a further object of the present invention is to provide a small electromagnetic relay by contriving the FIG. 6 is a perspective view showing the shape of a balancing spring
  • FIG. 7 is an explanatory view of the balancing spring as the engaging position is varied.
  • FIG. 1 showing a sectioned view of a relay of the present invention
  • 1 is a yoke
  • 2 is an iron core fixed to the above mentioned yoke
  • 3 is a coil bobbin arranged around the core 2
  • 4 is a coil wound on the above mentioned coil bobbin
  • 5 is a base made of an insulator
  • 6 is a coil terminal inserted into the above mentioned base 5
  • 7 is a lead wire
  • 8 is an L-shaped balancing spring supporting frame fixed to the base 5 with a fitting screw.
  • 9 is an L-shaped armature engaged in the extention l0 rotatably with the lower end of the yoke 1 (See FIG. 2).
  • 11 is a balancing spring engaged between a projection 12 provided on the armature 9 and a spring receiving part 13 provided on the upper part of the supporting frame 8.
  • Said spring receiving part 13 on the supporting frame 8 is provided on the bridging part at the free of the supporting frame 8 so that the biasing force of the above mentioned balancing spring 11 may be ad justed by plastically deforming the bridging part.
  • 14 is a stationary contact.
  • 15 is a stationary contact spring.
  • 16 is a stationary contact spring block molded integrally with the lower part of the stationary contact spring.
  • 17 is a first moving contact.
  • 18 is a first moving contact spring.
  • 19 is a terminal.
  • 20 is a first moving spring block made of an insulator.
  • 21 is a second moving contact.
  • 22 is a second moving contact spring.
  • 23 is a terminal.
  • 24 is a second moving spring block.
  • 25 is a terminal of the stationary contact.
  • 26 is a contact spring assembly frame made of an insulator. The first and second moving spring blocks 20 and 24 and stationary contact spring block 16 are pressed into a space in the center of said assembly frame 26 and are fixed to the base 5 with the supporting frame 8.
  • 27 is a card fixed to the upper part of the armature 9 so that the moving springs 18 and 22 may be moved on both sides of a spacer part 28 provided on a driving piece. 29 is a case.
  • FIG. 2 showing a disassembled perspective view
  • the fitting relations are indicated with the arrows.
  • a notch provided in the extension 10 of the armature 9 is loosely fitted with a projection 30 provided on the lower part of the yoke 1 so that the armature 9 may be rotated by the excitation of the coil 4 at this pivoting point.
  • a projection 31 of the yoke l is fitted in a hole 32 made on the side wall of the balancing spring supporting frame 8 and a projection 33 of the yoke l is fitted in a hole 34 made on each side wall of the supporting frame 8 and is secured to the frame 8 which is fixed to the base 5 with a screw.
  • the balancing spring 11 is ring-shaped and is rotatably engaged at the open end with a projection 12 provided on the armature 9 and also rotatably engaged on the side opposite the open ends with a receiving part 13 on the supporting frame 8.
  • FIG. 3 is a perspective view showing the balancing spring 11 as engaged.
  • the tail part 36 of the armature 9 is rotatably arranged in a space 35 provided in the side part of the yoke l.
  • the spring 11 is, further, arranged in parallel to side surface of the yoke 1.
  • FIG. 4A shows a view in which the resiliency of the balancing spring is decomposed into a component F vertical to the yoke and a component parallel with the yoke.
  • FIG. 4B shows a spring force of the balancing spring in the initial state in which the coil is not excited.
  • a is a rotating center of the armature
  • b is a rotating center of the balancing spring
  • c is a point of rotation with a radius of i with the point a as a center.
  • 1, is a distance from the point a to the center of the core
  • L is a distance between the armature and core in the center position of the core.
  • the angle formed by a line connecting a and c and a line connecting b and c; is 6,.
  • T will be a torque tending to separate the armature from the core and P, will be a force pressing the armature to the yoke hinge part.
  • FIG. 4C shows a spring force of the balancing spring in the final state in which the coil is excited and the attraction of the armature is finished.
  • the abscissa represents the clearance between the armature and core
  • L represents the case that the armature and core separate from each other most
  • L represents the case that the armature has attracted the core.
  • the load characteristic F of the second contact spring 22 shows that, at L a, the right end of the card 28 contacts the second contact spring 22 and that, at L b, the fixed contact 14 and second moving contact 21 tend to separate from each other.
  • F is a spring load characteristic by the first contact spring 18, F, is a spring load characteristic by the second contact spring 22, F is a sum of the first contact spring load characteristic F and second contact spring load characteristic F that is,
  • F F1 F2 F is a characteristic of the balancing spring having a negative characteristic (that, the smaller the clearance between the core surface and armature, the smaller the force) (the case of the conventional example)
  • F is a combined spring characteristic, that is, F F, F F, (the case of the present invention)
  • F is a characteristic of the balancing spring having a positive characteristic (that, the smaller the clearance between the core surface and armature, the larger the force) (the case of the conventional example)
  • F is a combined spring characteristic, that is,
  • 'yoke and b is a engaging point of the balancing spring with the spring receiving part 13 on the supporting frame.
  • FIGS. 7A to 7D show examples in which the balancing spring supporting point b is varied.
  • FIG. 7E shows the results.
  • FIG. 7A shows an initial position before the supporting point is adjusted.
  • FIG. 7B shows the case that the point b is moved toward the point a.
  • FIG. 7C shows the case that the point b is moved onto FIG. 7D shows the case that the point b is moved leftward from 56
  • FIG. 7F shows a combined spring load characteristic in case the balancing spring is supported in the state of FIG. 7D.
  • the spring load characteristic will be F', which will be a force generally smaller than F shown in FIG. 5 and will never be a bar to the charactistic.
  • the point L may be present between 0 and L (that is, the direction of the force may change) but must in a position close to the point 0.
  • the present invention has the following effects:
  • the balancing spring As the armature is attracted by the core, the balancing spring will be engaged so that the spring force may reduce. Therefore, the combined spring characteristic can be reduced so much that the attraction for the armature can be small, the electromagnetic relay can be made small, the spring load can be kept low and therefore a high sensitivity electromagnetic relay can be realized. Further, as additional effects, the energy of the spring load will reduce and therefore the chattering of the contacts will decrease.
  • the balancing spring ring-shaped By making the balancing spring ring-shaped, the direction of the spring displacement can be made effective and the relay can be made small.
  • the balancing spring supporting point can be varied and the spring characteristic can be freely regulated.
  • An electromagnetic relay comprising the combination of:
  • an electromagnetic device including a coil, a core member, and a pivotally mounted armature
  • An electromagnetic relay as set forth in claim 1 wherein said electromagnetic device comprises an L- shaped yoke to which a core having an exciting coil is fixed, and an L-shaped armature rotatably engaged in the end part of said yoke, a part of said armature being arranged rotatably in a space provided in the side part of the yoke.
  • a part of said spring supporting member is formed of a metallic frame fixed to a yoke and has a bridging part in one end part of it and a projection provided substantially in the center of said bridging part is made said spring supporting member.
  • said spring means is of a ring-shape having open ends, engaged at said open end with a projection provided on said armature and rotatably engaged on the side opposite the open ends with the receiving part provided to project on the upper part of the supporting frame.
  • said spring means is of a ring-shape having open ends and engaged in both open end parts with two projections provided on the armature and also on the side opposite the open ends with a spring supporting member.
  • An electromagnetic relay as set forth in claim 1 which includes a pair of fixed spring contacts disposed on opposite sides of said movable contact.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
US00284136A 1971-09-01 1972-08-28 Electromagnetic relay Expired - Lifetime US3800250A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6770371A JPS538901B2 (es) 1971-09-01 1971-09-01

Publications (1)

Publication Number Publication Date
US3800250A true US3800250A (en) 1974-03-26

Family

ID=13352566

Family Applications (1)

Application Number Title Priority Date Filing Date
US00284136A Expired - Lifetime US3800250A (en) 1971-09-01 1972-08-28 Electromagnetic relay

Country Status (9)

Country Link
US (1) US3800250A (es)
JP (1) JPS538901B2 (es)
AT (1) AT323830B (es)
CA (1) CA966173A (es)
CH (1) CH555591A (es)
DE (1) DE2242567C3 (es)
FR (1) FR2150952B1 (es)
GB (1) GB1402111A (es)
IT (1) IT962263B (es)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4112400A (en) * 1977-05-17 1978-09-05 Jaidinger Mfg. Co., Inc. Relay for printed circuits
US4490708A (en) * 1982-06-24 1984-12-25 General Electric Company Condition responsive electric switch system, electrical switching device and method of operation thereof
US4571567A (en) * 1983-06-01 1986-02-18 Hengstler Gmbh Geschaftsbereich, Haller-Relais Electromagnetic relay
US4616201A (en) * 1983-11-30 1986-10-07 Matsushita Electric Works, Ltd. Electromagnetic relay
US4658226A (en) * 1984-08-31 1987-04-14 Omron Tateisi Electronics Co. Electromagnetic relay with linearly moving block assembly
US5907268A (en) * 1997-07-01 1999-05-25 Eh-Schrack Components Ag Electromagnetic relay
CN103000464A (zh) * 2012-12-17 2013-03-27 无锡市凯旋电机有限公司 用于电磁脱扣器的耐冲击振动的平衡机构
US20130207755A1 (en) * 2012-02-13 2013-08-15 Stephan Lehmann Hinged armature bearing for magnetic tripping device
US20140015628A1 (en) * 2011-03-14 2014-01-16 Omron Corporation Electromagnetic relay
US20140022035A1 (en) * 2011-03-14 2014-01-23 Omron Corporation Electromagnetic relay
US20140028418A1 (en) * 2011-03-14 2014-01-30 Omron Corporation Electromagnetic relay
US9007156B2 (en) * 2012-12-07 2015-04-14 Fujitsu Component Limited Electromagnetic relay
US20150137917A1 (en) * 2012-01-17 2015-05-21 Gerhard Plechinger Relay for a defibrillator
US20160099096A1 (en) * 2013-05-08 2016-04-07 Eto Magnetic Gmbh Electromagnetic actuating apparatus
US20160379785A1 (en) * 2014-03-11 2016-12-29 Tyco Electronics Austria Gmbh Electromagnetic Relay

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3323266C2 (de) * 1983-06-28 1987-01-02 Hengstler GmbH, 7209 Wehingen Elektromagnetisches Relais mit Umschaltfeder
DE3348068C2 (en) * 1983-06-28 1988-02-04 Hengstler Bauelemente Gmbh, 7209 Wehingen, De Electromagnetic relay whose changeover spring has a special construction
DE3908442A1 (de) * 1989-03-15 1990-10-11 Eberle Gmbh Elektromagnetisches schaltgeraet
DE3942340A1 (de) * 1989-12-21 1991-06-27 Hengstler Bauelemente Elektromagnetisches relais mit rueckstellfeder

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3207961A (en) * 1963-09-25 1965-09-21 Gen Motors Corp Linear relay actuator
US3355629A (en) * 1965-06-15 1967-11-28 Cons Electronics Ind Electromagnetic switch with nonsnap-acting contacts
US3665353A (en) * 1971-04-27 1972-05-23 Collins Radio Co Solenoid with multi-rate return spring

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3207961A (en) * 1963-09-25 1965-09-21 Gen Motors Corp Linear relay actuator
US3355629A (en) * 1965-06-15 1967-11-28 Cons Electronics Ind Electromagnetic switch with nonsnap-acting contacts
US3665353A (en) * 1971-04-27 1972-05-23 Collins Radio Co Solenoid with multi-rate return spring

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4112400A (en) * 1977-05-17 1978-09-05 Jaidinger Mfg. Co., Inc. Relay for printed circuits
US4490708A (en) * 1982-06-24 1984-12-25 General Electric Company Condition responsive electric switch system, electrical switching device and method of operation thereof
US4571567A (en) * 1983-06-01 1986-02-18 Hengstler Gmbh Geschaftsbereich, Haller-Relais Electromagnetic relay
US4616201A (en) * 1983-11-30 1986-10-07 Matsushita Electric Works, Ltd. Electromagnetic relay
US4658226A (en) * 1984-08-31 1987-04-14 Omron Tateisi Electronics Co. Electromagnetic relay with linearly moving block assembly
US5907268A (en) * 1997-07-01 1999-05-25 Eh-Schrack Components Ag Electromagnetic relay
US20140028418A1 (en) * 2011-03-14 2014-01-30 Omron Corporation Electromagnetic relay
US9076617B2 (en) * 2011-03-14 2015-07-07 Omron Corporation Electromagnetic relay
US20140015628A1 (en) * 2011-03-14 2014-01-16 Omron Corporation Electromagnetic relay
US20140022035A1 (en) * 2011-03-14 2014-01-23 Omron Corporation Electromagnetic relay
US9123494B2 (en) * 2011-03-14 2015-09-01 Omron Corporation Electromagnetic relay
US9082575B2 (en) * 2011-03-14 2015-07-14 Omron Corporation Electromagnetic relay
US20150137917A1 (en) * 2012-01-17 2015-05-21 Gerhard Plechinger Relay for a defibrillator
US9184008B2 (en) * 2012-01-17 2015-11-10 Metrax Gmbh Relay for a defibrillator
US20130207755A1 (en) * 2012-02-13 2013-08-15 Stephan Lehmann Hinged armature bearing for magnetic tripping device
US9007154B2 (en) * 2012-02-13 2015-04-14 Siemens Aktiengesellschaft Hinged armature bearing for magnetic tripping device
US9007156B2 (en) * 2012-12-07 2015-04-14 Fujitsu Component Limited Electromagnetic relay
CN103000464A (zh) * 2012-12-17 2013-03-27 无锡市凯旋电机有限公司 用于电磁脱扣器的耐冲击振动的平衡机构
US20160099096A1 (en) * 2013-05-08 2016-04-07 Eto Magnetic Gmbh Electromagnetic actuating apparatus
US9761363B2 (en) * 2013-05-08 2017-09-12 Eto Magnetic Gmbh Electromagnetic actuating apparatus
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
CH555591A (de) 1974-10-31
IT962263B (it) 1973-12-20
FR2150952B1 (es) 1978-02-10
GB1402111A (en) 1975-08-06
JPS4833341A (es) 1973-05-09
DE2242567A1 (de) 1973-03-08
CA966173A (en) 1975-04-15
JPS538901B2 (es) 1978-04-01
DE2242567C3 (de) 1980-08-21
DE2242567B2 (de) 1979-12-13
FR2150952A1 (es) 1973-04-13
AT323830B (de) 1975-07-25

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