US3842231A - Contact spring set for an electromagnetic relay - Google Patents

Contact spring set for an electromagnetic relay Download PDF

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Publication number
US3842231A
US3842231A US00348683A US34868373A US3842231A US 3842231 A US3842231 A US 3842231A US 00348683 A US00348683 A US 00348683A US 34868373 A US34868373 A US 34868373A US 3842231 A US3842231 A US 3842231A
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US
United States
Prior art keywords
contact
members
contact elements
insulating
contact spring
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
US00348683A
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English (en)
Inventor
H Schedele
W Bosch
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.)
Siemens AG
Original Assignee
Siemens AG
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 AG filed Critical Siemens AG
Application granted granted Critical
Publication of US3842231A publication Critical patent/US3842231A/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
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H01H11/04—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
    • H01H11/06—Fixing of contacts to carrier ; Fixing of contacts to insulating carrier
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H01H50/56—Contact spring sets
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49105—Switch making

Definitions

  • An electromagnetic relay has a contact spring set in which the contact springs are held in fixed position between two plastic base members, one of which is thermoplastic and is secured to the other by deforming the thermoplastic material during heating by ultrasonic means.
  • the contact springs are aligned in the correct position during assembly by means of registration surfaces mounted on the base member which is not deformed during assembly.
  • the present invention relates to a contact set for an electromagnetic relay, and more particularly to such a contact set which is adapted for mechanized assembly.
  • relays and miniature relays of other types, require very careful soldering in connecting the terminals of the relays, to protect the electrical contact springs of the relay from damage, as the terminals are located quite near to the contact springs.
  • solder connections are sometimes passed through apertures in a separate base plate, formed of insulating material, and the soldering takes place on the opposite side of the plate from the contact springs.
  • space around the edge of the apertures allows contaminating vapors to pass through the apertures, which degrade the performance of the contact springs.
  • Another object of the present invention is to provide such a contact spring set which is readily adaptable to being assembled and constructed by a highly mechanized process.
  • a further object of the present invention is to provide such a contact spring set in which the contact springs may be placed in position relative to an insulating-base member prior to assembly of the apparatus.
  • Another object of the present invention is to provide such a contact spring set in which only two insulating-
  • a contact spring set including a block of insulating material formed of an upper base member and a lower base member, said contact springs being interposed between the two base members and fixed in position in relation to one of said base members.
  • FIG. 1 is an end elevation view of an electromagnetic card relay having a contact spring set formed in accordance with an illustrative embodiment of the present invention
  • FIG. 2 is a perspective view of a portion of the apparatus of FIG. 1;
  • FIG. 3 is an exploded perspective view of a portion of the apparatus illustrated in FIGS. 1 and 2, illustrating the manner of assembly of one of the contact springs;
  • FIG. 4 is a vertical cross sectional view of a portion of the apparatus illustrated in FIG. 3, when in assembled condition;
  • FIG. 5 is a vertical cross sectional view of the apparatus of FIG. 4, taken along the section line VV;
  • FIG. 6 is an exploded perspective view of a portion of the apparatus of FIGS. 1 and 2, illustrating the manner of assembly of a second contact spring;
  • FIG. 7 is an exploded perspective view of a portion of the apparatus of FIGS. 1 and 2, illustrating the manner of assembly of a third contact spring;
  • FIG. 8 is a vertical cross sectional view of a portion of the apparatus illustrated in FIG. 7, after assembly.
  • FIG. 9 is a horizontal cross sectional view of a portion of the apparatus illustrated in FIG. 8, taken along the section line IX-IX.
  • the insulating block of the relay is made up of a lower base member 1 and an upper base member 2.
  • the base members 1 and 2 are both formed of insulating material, and are assembled in such a way as to hold various contact springs 8, 9 and 10 in correct relationship, after assembly.
  • the contact springs 8 and 9 are fixed contacts of the relay and the contact spring 10 is a movable contact spring, normally closing an electrical circuit with the upper contact spring 8, but opening that circuit and closing an electrical circuit with the contact spring 9, when the relay is operated.
  • a magnet system is provided for operation of the relay, and the magnet system incorporates a yoke 3, a coil 4 supported by the yoke 3, and an actuating member 5 having a depending projection 7.
  • the actuating member 5 functions to lower the projection 7 against the free end of the contact spring 10, to change the position of the contact spring 10.
  • the magnet system is typically a separate assembly, and is connected with the contact spring set by means of a bracket 6, adapted to engage notches provided in opposite side portions of the base members 1 and 2, and held thereby when the magnet assembly and contact spring set are assembled.
  • the contact sets comprise two separate single pole double-throw switches, one being located on either side of the base members 1 and 2.
  • the actuating member 5 is provided with two projections 7, one for each of the movable contact springs 10 and 10' of the two switches.
  • the two switches are identical, except for their position relative to the base members 1 and 2, the construction and operation of only one of the contact spring sets need be described in detail.
  • one of the contact spring sets is arranged in a recess 11 having a side wall defined by a side surface of the base members 1 and 2, and having lower and upper walls defined by a portion 1a of the lower base member 1 projecting outwardly below the recess 11, and a corresponding portion 2a of the upper base member 2 extending outwardly above the recess 11.
  • the three contact springs 8, 9 and 10 have portions which are anchored between the base members 1 and 2, and are maintained in correct position thereby.
  • Each of the base members 1 and 2 are formed as a relatively flat plastic construction, having a central recess or aperture 12 designed to accommodate the magnetic coil 4.
  • Each of the three contact springs 8, 9 and 10 have an individual terminal part 8a, 9a and 10a, by which electrical connections to the control springs may be made by soldering.
  • the contactmaking part 8!: of the upper contact spring is positioned at the upper portion of the recess 11, and the contact-making part 9b of the contact spring 9 is positioned directly therebelow,
  • the contact-making part 10b of the contact spring 10 is positioned between the contact-making parts of the contact springs 8 and 9, and is adapted to make electrical contact with one or the other in accordance with the condition of the actuating member 5.
  • the recess 11 may be referred to as a circuit chamber, since it is isolated from the magnet assembly by the overlying portion of the upper base member 2, and isolated from the terminal parts 8a, 9a and 10a by the underlying portion of the lower base member 1.
  • the lower base member 1 is formed of a plastic material having a relatively high melting point, in order to provide mechanical integrity at the time heat is applied to the upper base member during assembly.
  • the upper base member is formed of thermoplastic material so that application of heat thereto results in a softening and deforming of the plastic material.
  • the lower base member 1 is not softened during such heating, and so its surfaces do not undergo any change during assembly.
  • the lower base member 1 may be formed of thermoplastic material having a higher melting point than that of the upper base member 2, or, alternatively, may be formed of thermosetting material, or the like.
  • the lower surface of the portion 2a of the upper base member 2 is provided with a recess 14 located directly above the contact-making part of the contact spring 8, and a corresponding recess 13 is provided in the upper surface of the portion la at a position underlying the contact-making part of the lower contact spring 9.
  • the recesses 13 and 14 permit the outer ends of the stationary contact springs 8 and 9 to remain out of direct contact with the insulating base members 1 and 2, and the contacts are thereby made less vulnerable to mechanical vibrations transmitted through the base members 1 and 2.
  • FIG. 3 an exploded view of a contact spring 19 is illustrated, in association with cooperating portions of the lower base member 1 and the upper base member 2.
  • the contact spring 19 corresponds to the contact spring 9 shown in FIGS. 1 and 2, but is formed in a slightly different shape than that shown in FIG. 2.
  • the spring 19 has, at one end, a contact-making part 19b, and at the other end is connected to a vertically extending terminal part 19a.
  • the horizontal part of the spring 19 is joined to the terminal part 19a by a vertically disposed part 19d, having a plurality of upwardly extending tabs 190.
  • the terminal part is lowered through a window 16 provided in the lower base member 1, until the horizontal part of the spring 19 has been lowered into contact with a horizontal supporting surface 17 provided on the lower base member 1.
  • the position of the surface 17 is controlled with great precision during manufacture of the member 1, so that any manufacturing variations in the size and shape of the spring 19 do not affect the positioning of the horizontal part of the spring 19.
  • the upper base member 2 is lowered into association with the lower base member 1, and a wedge-shaped nose member 21 glides downwardly along the terminal part 190, bearing against a side edge of the window 16, and pressing the terminal part 19a and the vertically extending part 19d firmly against the inside surface of a wall 22 formed on the base member 1.
  • the position of this surface of the wall 22 is controlled with precision during manufacture, so that the contact spring 19 is correctly positioned when the vertically extending part 19d lies against it.
  • Final assembly of the upper and lower base members 1 and 2 takes place-by means of ultrasonic stapling, in which the upper base member 2 is pressed downwardly against the lower base member 1 and is deformed by heat generated by the application of ultrasonic sound thereto until the correct assembled condition has been reached.
  • the nose 21 is simultaneously pressed downwardly into the window 16 and deformed in such a way as to tightly close the window 16, enveloping the upper portion of the terminal part 19a, and forming an impermeable barrier between the contact spring 19 and the terminal part 19a, where the soldering takes place.
  • FIGS. 4 and 5 show, in two vertical sections which i are perpendicular to each other, the cooperation of the contact spring 19 with the associated components of the assembly.
  • the surface 17 support, the horizontal part of the contact spring 19, and the cooperation of the upwardly extending tabs 190 with the upper base member 2 is illustrated.
  • the deformation of the nose 2], in a manner such as to fill the window 16, is also illustrated in FIG. 4.
  • the lower edge of the part 19d is supported by the surface 24 of the lower base member 1, as best illustrated in FIG. 5.
  • FIG. 6 illustrates, in exploded perspective view, the manner in which the contact spring 8 is assembled in relation to the lower base member 1 and the upper base member 2.
  • the contact spring 8 incorporates a contact-making part 8b at one end thereof and a downwardly depending terminal part 8a at the other end thereof.
  • the terminal part 8a is adapted to be inserted downwardly through a window 25 provided in the lower base member I, so that the horizontal portion of the contact spring 8 is supported on a horizontal surface 30, formed as the upper surface of a wall 27.
  • a deformable nose 26, depending from the upper base member 2 is aligned with the window 25 and urges the contact spring 8 into firm association with the outer surface of the wall 27 during assembly.
  • a peg 28, provided on the upper base member 2 is received in an aperture 29, and the lower end of the peg is deformed to form a rivet head when assembly is complete.
  • the position of the surface 30 is controlled with great precision during manufacture of the base member 1.
  • a plurality of depending noses 31 are provided extending downwardly from the upper base member 2 and are adapted to urge the contact spring 8 against the surface 30.
  • the noses 31 may be formed without any particular tolerance since they are softened and deformed as much as necessary during assembly. After hardening on cooling, they function to maintain the contact spring 8 in position against the surface 30.
  • FIG. 7 illustrates, in exploded perspective view, the manner in which the contact spring is assembled in association with the lower and upper base members 1 and 2.
  • the contact spring 10 is formed with a free end as illustrated in FIGS. 1 and 2, for cooperation with the depending projection 7 of the actuating member 5, and has a depending terminal part 10a secured to the other end.
  • the terminal part 10a is adapted to pass downwardly through a window 32 provided in the lower base portion 1, until the middle portion of the spring contact 10 is brought into contact with an inclined surface 35, provided on the base member 1.
  • a shoulder 33 is provided adjacent the surface 35 on one side thereof, and an upwardly extending projection 34 is provided on the surface 35 on the opposite side of the contact spring 10 from the shoulder 33.
  • the shoulder 33 and the projection 34 together serve to maintain the contact spring 10 in the proper position prior to assembly of the base members 1 and 2.
  • a peg 37 is lowered into an aperture 39 provided in the lower base portion 1, and the end thereof is softened to form a rivet head.
  • the peg 37 has a conical portion 38 at its base, adjacent the surface 36, and the portion 38 is adapted to be softened during assembly and to be squeezed between the surfaces 35 and 36, outwardly from the peg 37, and against an arcuate notch provided in an edge of the contact spring 10, forcing the contact spring 10 into aligned relationship against the shoulder 33. In this manner, correct alignment of the contact spring 10 is assured during assembly.
  • the position of the shoulder 33, as well as the position of the surface 35, are accurately controlled during manufacture of the lower base portion 1.
  • the ribs 40 are softened and deformed as required, but upon hardening, function to maintain the spring 10 in position against the surface 35.
  • FIGS. 8 and 9 show two vertical cross sectional views showing the association of the contact spring 10 with the other elements of the assembly.
  • FIG. 9 illustrates how the conical portion 38 of the peg 37 has been urged against the spring 10 to force it into juxtaposition with the'shoulder 33.
  • FIG. 8 illustrates the manner in which the rivet head 37a is formed at the lower end of the peg 37.
  • a counterbore is provided in the lower portion of the aperture 39, to provide a shoulder maintaining the expanded rivet head 37a in position after assembly.
  • the assembled base formed of the members 1 and 2 may also be provided with further recesses, projections and the like, for the provision of other components such as a grounding spring or a relay protection cap.
  • the nose 41 illustrated in FIG. 8 is, for example, provided for the purpose of securing a protective cap (not shown) in position.
  • present invention may be employed in the manufacture of other assemblies in order to provide an efficient and highly accurate assembly process, which is highly adaptable to being mechanized.
  • a contact spring set for an electromagnetic relay comprising a plurality of electrical contact elements, and a block formed of insulating material and comprising first and second insulating members adapted to support said contact elements, said first insulating member being formed of thermoplastic material and said second insulating member being formed of an inherently stable plastic material, said block having a recess formed therein, said electrical contact elements having their contact-making parts supported within said recess, one of said contact elements having a portion interposed between said two insulating members, said two insulating members bearing against said one contact element to maintain it in fixed position relative to said second member.
  • Apparatus according to claim 1 including a plurality of movable contact elements, said movable contact elements being mounted on said block so that the motion of such movable elements defines a pair of spaced parallel planes.
  • Apparatus according to claim 1 including a terminal connected with said one contact element and adapted to be soldered to an electrical conductor, said terminal extending through an aperture in one of said members.
  • all of said contact elements comprise electrically conductive springs interposed between said two members and terminal elements for each of said springs extending at an angle to said springs through apertures in said one member.
  • Apparatus according to claim 1 including a movable contact spring mounted between inclined supporting surfaces disposed on said two members.
  • Apparatus according to claim 1 including means for urging one of said contact elements laterally against a supporting wall formed integrally with one of said members by a projection formed integrally with the other said member.
  • Apparatus according to claim 13 wherein said one contact element has a plurality of projections, said projections being adapted to enter one of said members during assembly of said one member with said other member.
  • Apparatus according to claim 1 including means formed integrally with one of said members for supporting all of said contact elements preparatory to assembling said two members together.
  • a method for the production of a contact spring set including the steps-of providing first and second insulating members adapted to be interlocked to form a complete contact set assembly, providing a plurality of accurately positioned surfaces on said first member,
  • the method according to claim 15 including the step of deforming a projection integral with said second insulating member without deforming said second member as said projection is urged against a contact member.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Manufacture Of Switches (AREA)
  • Push-Button Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)
US00348683A 1972-04-10 1973-04-06 Contact spring set for an electromagnetic relay Expired - Lifetime US3842231A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2217218A DE2217218C2 (de) 1972-04-10 1972-04-10 Kontaktfedersatz für ein elektromagnetisches Karten-Relais in Flachbauweise und Verfahren zur Herstellung desselben

Publications (1)

Publication Number Publication Date
US3842231A true US3842231A (en) 1974-10-15

Family

ID=5841511

Family Applications (1)

Application Number Title Priority Date Filing Date
US00348683A Expired - Lifetime US3842231A (en) 1972-04-10 1973-04-06 Contact spring set for an electromagnetic relay

Country Status (14)

Country Link
US (1) US3842231A (fr)
JP (1) JPS5640461B2 (fr)
AT (1) AT337816B (fr)
CH (1) CH553477A (fr)
CS (1) CS177857B2 (fr)
DE (1) DE2217218C2 (fr)
DK (1) DK139009C (fr)
ES (1) ES413248A1 (fr)
FR (1) FR2179891B1 (fr)
GB (1) GB1389644A (fr)
IT (1) IT982683B (fr)
NL (1) NL7305003A (fr)
SE (1) SE388501B (fr)
YU (1) YU35294B (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4218595A (en) * 1977-02-18 1980-08-19 Niles Parts Co., Ltd. Composite switch device mounted to the steering shaft of automobiles
US4310818A (en) * 1979-03-30 1982-01-12 Siemens Aktiengesellschaft Electromagnetic relay with improved fixed contact elements
US4516099A (en) * 1981-04-17 1985-05-07 Takamisawa Electric Co., Ltd. Electromagnetic relay
US4653179A (en) * 1983-07-28 1987-03-31 Marquardt Gmbh Method of manufacturing an electrical push-button switch
US4672158A (en) * 1984-09-05 1987-06-09 At&T Company And At&T Technologies, Inc. Multiple contact switch

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS579973B2 (fr) * 1974-04-24 1982-02-24
SU559296A1 (ru) * 1975-04-07 1977-05-25 Предприятие П/Я А-1353 Пакет пружин электромагнитного реле
IT1059599B (it) * 1975-04-15 1982-06-21 Int Standard Electric Corp Rele di tipo minatura perfezionato
DE2556610C3 (de) * 1975-12-16 1985-11-21 Sauer, Hans, 8024 Deisenhofen Aus duroplastischem und thermoplastischem Isolierstoff bestehender Grundkörper für hermetisch abdichtbare Relais
DE2644277C2 (de) * 1976-09-30 1978-08-03 Siemens Ag, 1000 Berlin Und 8000 Muenchen Anordnung zur Halterung eines Metallteiles in einem Schaltgerätegehäuse
IT1075619B (it) * 1977-02-02 1985-04-22 Equipaggiamenti Meccanico Elet Rele' elettromagnetico piatto
US4535311A (en) * 1983-05-20 1985-08-13 Nec Corporation Contact support means for an electromagnetic relay
DE3545356C2 (de) * 1985-12-20 1997-04-10 Siemens Ag Sicherheits-Schaltrelais
DE3812732A1 (de) * 1988-04-16 1989-10-26 Asea Brown Boveri Elektrisches installationsgeraet
JP7380028B2 (ja) * 2019-09-30 2023-11-15 オムロン株式会社 リレー

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3356802A (en) * 1964-07-10 1967-12-05 Simon Hans Electric snap-action switch
US3377450A (en) * 1966-04-22 1968-04-09 Charles B. Grady Jr. Electric pushbutton leaf spring switch
US3437772A (en) * 1966-06-06 1969-04-08 Cutler Hammer Inc Contact structure for electrical switching device and method of assembly
US3485982A (en) * 1965-10-14 1969-12-23 Robertshaw Controls Co Ultrasonically welded switch construction and method

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE624612A (fr) * 1961-11-10
NL6707443A (fr) * 1966-06-30 1968-01-02
DE1919648B2 (de) * 1969-04-18 1971-12-30 E. Haller & Co, 7209 Wehingen Isolierplatte fuer die halterung und gegenseitige isolierung mehrerer kontaktplatten oder federn von elektrischen relais
DE7023677U (fr) * 1970-06-24 1970-12-17 Zettler A Gmbh
DE7036586U (de) * 1970-10-02 1971-10-07 Elmeg Kontaktfeder fuer relais.
JPS47917U (fr) * 1971-01-16 1972-08-09
DE7116877U (de) * 1971-04-30 1971-08-05 Siemens Ag Kontaktfedersatz

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3356802A (en) * 1964-07-10 1967-12-05 Simon Hans Electric snap-action switch
US3485982A (en) * 1965-10-14 1969-12-23 Robertshaw Controls Co Ultrasonically welded switch construction and method
US3377450A (en) * 1966-04-22 1968-04-09 Charles B. Grady Jr. Electric pushbutton leaf spring switch
US3437772A (en) * 1966-06-06 1969-04-08 Cutler Hammer Inc Contact structure for electrical switching device and method of assembly

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4218595A (en) * 1977-02-18 1980-08-19 Niles Parts Co., Ltd. Composite switch device mounted to the steering shaft of automobiles
US4310818A (en) * 1979-03-30 1982-01-12 Siemens Aktiengesellschaft Electromagnetic relay with improved fixed contact elements
US4516099A (en) * 1981-04-17 1985-05-07 Takamisawa Electric Co., Ltd. Electromagnetic relay
US4653179A (en) * 1983-07-28 1987-03-31 Marquardt Gmbh Method of manufacturing an electrical push-button switch
US4672158A (en) * 1984-09-05 1987-06-09 At&T Company And At&T Technologies, Inc. Multiple contact switch

Also Published As

Publication number Publication date
JPS499657A (fr) 1974-01-28
FR2179891A1 (fr) 1973-11-23
YU82973A (en) 1980-04-30
GB1389644A (en) 1975-04-03
DK139009C (da) 1979-05-14
CS177857B2 (fr) 1977-08-31
CH553477A (de) 1974-08-30
DE2217218C2 (de) 1982-09-02
IT982683B (it) 1974-10-21
NL7305003A (fr) 1973-10-12
AT337816B (de) 1977-07-25
SE388501B (sv) 1976-10-04
FR2179891B1 (fr) 1976-11-12
DE2217218B1 (de) 1973-09-27
DK139009B (da) 1978-11-27
ES413248A1 (es) 1976-05-16
YU35294B (en) 1980-10-31
JPS5640461B2 (fr) 1981-09-21
ATA247273A (de) 1976-11-15

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