US3708635A - Multiple switch assembly with improved reciprocating leaf spring contact cam actuator - Google Patents

Multiple switch assembly with improved reciprocating leaf spring contact cam actuator Download PDF

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Publication number
US3708635A
US3708635A US00154031A US3708635DA US3708635A US 3708635 A US3708635 A US 3708635A US 00154031 A US00154031 A US 00154031A US 3708635D A US3708635D A US 3708635DA US 3708635 A US3708635 A US 3708635A
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United States
Prior art keywords
leaf spring
housing
plunger
contact
contacts
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
US00154031A
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English (en)
Inventor
C Cosley
W Streuer
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.)
Oak Electro Netics Corp
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Oak Electro Netics Corp
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Publication date
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Publication of US3708635A publication Critical patent/US3708635A/en
Assigned to ZENITH ELECTRONICS CORPORATION, A CORP. OF DE reassignment ZENITH ELECTRONICS CORPORATION, A CORP. OF DE LICENSE (SEE DOCUMENT FOR DETAILS). Assignors: OAK INDUSTRIES, INC.
Assigned to ZENITH ELECTRONICS CORPORATION, A CORP OF DELAWARE reassignment ZENITH ELECTRONICS CORPORATION, A CORP OF DELAWARE LICENSE (SEE DOCUMENT FOR DETAILS). Assignors: OAK INDUSTRIES, INC.,
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Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H15/00—Switches having rectilinearly-movable operating part or parts adapted for actuation in opposite directions, e.g. slide switch
    • H01H15/02—Details
    • H01H15/06—Movable parts; Contacts mounted thereon
    • H01H15/10—Operating parts
    • H01H15/102—Operating parts comprising cam devices
    • H01H15/105—Adjustable cams
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H01H13/12—Movable parts; Contacts mounted thereon
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H15/00—Switches having rectilinearly-movable operating part or parts adapted for actuation in opposite directions, e.g. slide switch
    • H01H15/02—Details
    • H01H15/06—Movable parts; Contacts mounted thereon
    • H01H15/10—Operating parts
    • H01H15/102—Operating parts comprising cam devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H01H1/5805—Connections to printed circuits
    • 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
    • H01H1/24—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting
    • H01H1/26—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting with spring blade support
    • H01H2001/265—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting with spring blade support having special features for supporting, locating or pre-stressing the contact blade springs
    • 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
    • H01H2011/062—Fixing of contacts to carrier ; Fixing of contacts to insulating carrier by inserting only

Definitions

  • ABSTRACT A pushbutton switch of the type in which a moving Corp., Crystal Assignee: Oak Electro/Netics Lake, lll. plunger is effective to open and close terminal contact Flledl J 1971 springs.
  • the terminal contact springs within the switch housing are biased in such a way that when in the [21] Appl' 154,031 closed position, the contacts are firmly held together preventing momentary separation.
  • the switches may be mounted in a group by spring clips or the like,
  • the present invention relates to an improved pushbutton switch and particularly to a construction of the type described which prevents momentary separation of the contacts when in the closed position.
  • Another purpose is a simply constructed reliably operable pushbutton switch of the type described.
  • Another purpose is a pushbutton switch which holds circuit board from pressure applied to the switch.
  • FIG. 1 is an exploded perspective illustrating a switch of the type described
  • FIG. 2 is a side view of one of the housing halves used in the switch construction of FIG. 1,
  • FIG. 3 is a side view, similar to FIG. 2, but illustrating the contacts and plunger positioned within the housing half,
  • FIG. 4 is a section along plane 44 of FIG. 2,
  • FIG. 5 is a section along plane 5-5 of FIG. 2,
  • FIG. 6 is a section along plane 6-6 of FIG. 2,
  • FIG. 7 is a section along plane -77 of FIG. 2,
  • F IG. 8 is a top plan view of a switch mounting arrangement showing a pair of switches positioned therein,
  • FIG. 9 is a sideview .of the switch mounting arrangemm of FIG. 8,
  • FIG. 10 is a section along plane l0 10 ofFIG. 9,
  • FIG. 11 is a partial top plan view of a modified form of switch mounting arrangement
  • FIG. 12 is a partial side view of a switch in the mounting arrangement of FIG. 1 1,
  • FIG. 13 is a partial end view of the mounting arrangement of FIGS. 1 l and -I2, and
  • FIG. 14 is a section along plane l4-l4 of FIG. 13.
  • FIG. 1 a pair of housing halves or elements are indicated at 10 and 12.
  • the housing elements are symmetrical and formed of a suitable plastic material which permits them to be ultrasonically welded together after assembly of the contacts and plunger described hereinafter.
  • the housing elements 10 and 12 are hollow for positioning of the switch contacts andthe plunger as described. Only one of the housing elements will be described as they are symmetrical.
  • An opening 14 surrounded by a flange 16 may be positioned at the top of each of the housing elements to receive a plunger indicated generally at 18.
  • the plunger 18 may have a bottom stem portion 20 surrounded by a coil spring 22 which maintains the plunger in the upward position of FIG. 3.
  • the coil spring may be seated in a depression 24, illustrated in FIG. 1, which is circular in configuration. Beneath the depression 24 is an opening 26 which receives the stem 20 when the plunger is depressed.
  • a passage 28 connects the opening 26 and the depression 24.
  • the plunger 18 may have an exterior portion 30 which in conventional use will have a knob, button or key attached thereto.
  • a pair of cams 32 extend outwardly from the sides of an enlarged portion 34 of the plunger, with the cams being used to open and close the switch contacts within the housing.
  • a pair of terminal contact springs are indicated at 36 and 38.
  • Each of the contact springs 36 and 38 may have terminal portions 40 and 42 which extend outwardly throughthe bottom of the housing, for example for use in connection with a printed circuit board.
  • Adjacent the top of terminal contact spring 36 are a pair of laterally extending wings 44 which are adapted to be positioned against an interior portion of the housing as described hereinafter.
  • Contact 38 has a bead 46 adjacent its upper end, which bead will be contacted by cam 32 when the plunger is moved into the housing.
  • Contact 38 also has a ridge 48 which is positioned to be placed in contact with terminal contact spring 36 when the plunger is moved into'the housing.
  • the terminal contact springs 36 and 38 are normally open contacts which are closed by depressing plunger 18.
  • a projection 50 is positioned on one side of each of the housing elements and there is a symmetrical generally identically positioned projection 52 on the other side of each of the housing elements. Adjacent the bottom of each housing element are-a plurality of grooves indicated at 54, 56, 58 and 60. Terminal contact springs 36 and 38 are positioned within grooves 54 and 56. Tabs or the like 62 are formed in those portions of the terminal contact springs 36 and 38 positioned within grooves 54 and 56 and there are mating portions in the grooves 54 and 56to receive the tabs 62 to thus firmly position the terminal contact springs within the grooves and to prevent any relative movement between these members and the housing.
  • both grooves 54 and 56 slant inwardly toward the center of the housing or-toward the plunger.
  • Terminal contact spring 36 has its laterally extending wings 44 positioned against the projections 50 and thus is under tension or is flexed when positioned within the housing. Note FIG. 3.
  • Terminal contact spring 36 is flexed outwardly toward the outside wall of the housing.
  • Groove 54 in combination with the projection 50, places terminal contact'spring 36 under tension and in effect biases the terminal contact spring firmly against the projections 50.
  • terminal contact springs 36 and 38 are normally open, terminal contact spring 38 is free within the housing.
  • terminal contact spring 38 When the plunger 18 is depressed, cam 32 will strike bead 46 and move terminal contact spring 38 outwardly against terminal contact spring 36. As the cam moves further into the housing, terminal contact spring 36 will be moved away from projection 50, and will be flexed even further in an outward direction. Thus, cam 32 holds terminal contact spring 38 against terminal contact spring 36 and the flexure of terminal contact spring 36 holds it firmly in contact with terminal contact spring 38. Vibration or shock will not cause a momentary separation of the contacts. Both terminal contact springs are flexed away from their normal direction and are thus held firmly in contact with each other.
  • a second pair of terminal contact springs is indicated at 64 and 66 and function as normally closed contacts. Each have terminal portions 68 which extend outwardly from the bottom of the housing again for attachment to a printed circuit board. Terminal contact springs 64 and 66 are positioned within grooves 58 and 60 which again direct the springs, in their free state, toward the center of the switch housing, or toward the plunger. Terminal contact spring 64 has a pair of laterally spaced and upwardly-directed wings 70 which will be in contact with projections 52, as illustrated in FIG. 3. Terminal contact spring 66 has a bead 72 and a ridge 74 which is normally closed against a ridge 76 on terminalcontact spring 64 when the contacts are in the closed position.
  • terminal contact springs 64 and 66 are flexed outward as they are positioned against the outside surfaces of projections 52.
  • terminal contact springs 64 and 66 are closed.
  • the outward flexure away from the natural inward direction holds terminal contact spring 64 into contact with terminal contact spring 66 and thus holds the contacts together, preventing any bounce or momentary separation of the terminal contact springs from vibration or shock.
  • cam 32 will strike bead 72 and move terminal contact spring 66 away from terminal contact spring 64', thus opening the connection between the two terminal contactsprings.
  • switch structure has been shown and described ashaving one pair of normally open contacts and a second pair of normally closed contacts, it should be obvious that the switch may include all normally open contacts or all normally closed contacts. Also there may be only one pair of contacts with a particular switch rather than two pairs.
  • a generally U-shaped trough is indicated at 80 and includes a bottom 82 and side walls 84 and 86.
  • each of the switches 92 will fit between the projections 90 preventing side movement in the trough 80.
  • a spring clip 94 which may be integral with the sides 84 and 86 and an inwardly-directed portion 96 at its lower edge. The inwardly-directed portion 96 prevents upward removal of the switches 92 from the U-shaped trough 80.
  • FIG. 10 which illustrates the details of the manner in which the switches are held in position.
  • FIGS. 11-14 show a second form of switch mounting arrangement.
  • a plate 100 is spaced from the upper surface of a printed circuit board indicated at 102.
  • the plate 100 may have a plurality of openings 104 for receiving switches of the type described.
  • Cooperating with each opening 104 is a pair of spring clips 106.
  • the upper end of each of the spring clips 106 has tabs or the like 108 and 1 10 which extend over the top of the plate 100.
  • the bottom of each of the spring clips 106 has fingers 112 ,which extend into openings or the like 114 near the bottom of the switch elements 10 and 12.
  • the spring clips are firmly anchored to each switch and the top of the spring clips are attached to the plate 100.
  • each of the spring clips are first attached to the switches.
  • Thespring clips are'made of a light gauge sheet metal and are flexible or resilient, so that when the switches with the spring clips attached thereto are pushed down into the openings 104, the spring clips will be forced inwardly by the sides of the openings until such time as they may snap outwardly when the upper edge 116 has passed the bottom of the plate 100.
  • the tabs 108 and 110 will then firmly hold the switches in position relative to plate 100.
  • a switch including a housing, a plunger reciprocally movable within said housing, at least two leaf spring contacts within said housing and having portions thereof extending outside of said housing for connection into an electrical circuit, said plunger having portions positioned to engage at least one of said leaf spring contacts, said leaf spring contacts being movable by said plunger between an open position in which there is no contact between said, leaf spring contacts, and a closed position in which there is contact between said leaf spring contacts, said housing having cooperating portions for placing said leaf spring contacts under tension including an opening for each leaf spring contact, with a portion thereof passing through the opening and with said opening being directed toward said plunger, at least one of said leaf spring contacts being urged against one of the cooperating portions of the housing, inward movement of said plunger moving the other leaf spring contact away from the plunger increasing the tension of said other leaf spring contact.
  • the structure of claim 1 further characterized in that said housing is hollow and is formed of two generally symmetrical parts.
  • the structure of claim 1 further characterized in that there are four leaf spring contacts positioned within said housing, with all of said leaf spring contacts being directed toward the plunger.
  • the structure of claim 6 further characterized by and including at least two projections extending outwardly into the interior of said housing, there being a pair of leaf spring contacts associated with each projection.
  • said one leaf spring contact includes a pair of outwardly-extending wings in contact with said housing cooperating portion.
  • a switch including a housing, a plunger reciprocally movable within said housing, at least two leaf spring contacts within said housing and having portions thereof extending outside of said housing for connection into an electrical circuit, said plunger having portions positioned to engage at least one of said leaf spring contacts, said leaf spring contacts being movable by said plunger between an open position in which there is no contact between said leaf spring contacts, and a closed position in which there is contact between said leaf spring contacts, said housing having cooperating portions for placing said leaf spring contacts under tension including a pair of oppositely-disposed projections, each extending generally toward the interior of the housing, at least one of said leaf spring contacts being urged against one of .said oppositely-disposed projections, inward movement of said plunger moving the other leaf spring contact away from the plunger increasing the tension of said other leaf spring contact.
  • a plurality of switch assemblies each including a housing, a plunger reciprocal within said housing, each switch assembly between said leaf spring contacts, said housing having cooperating portions thereof placing said leaf spring contacts under tension, with at least one of said leaf spring contacts being urged against one of said cooperating portions of said housing, inward movement of said plunger moving the other leaf spring contact away from the plunger increasing the tension of said other leaf spring contact,
  • a mounting plate having a plurality of openings, one for each switch assembly, spring clips associated with each opening for positioning a switch assembly therein, portions of said spring clips overlying said plate, and portions of said spring clips being in operable engagement with each switch assembly.
  • the structure of claim 12 further characterized in that there are a pair of spring clips for each opening, with each of said clips having fingers in operable engagement with a portion of the switch assembly.
  • each of said switch assemblies have openings in the exterior thereof to receive said fingers.
  • a plurality of switch assemblies each including a housing, a plunger reciprocal within said housing, each switch assembly including at least two leaf spring contacts having portions thereof extending outside of said housing for connection into an electrical circuit, said contacts being movable by said plunger between an open position in which there is no contact between said leaf spring contacts and a closed position in which there is contact between said leaf spring contacts, said housing having cooperating portions thereof placing said leaf spring contacts under tension, with at least one of said leaf spring contacts being -urged against one of said cooperating portions of said housing, inward movement of said plunger moving the other leaf spring contact away from the plunger increasing the tension of said other leaf spring contact,
  • the structure of claim 15 further characterized by and including a plurality of projections inwardly directed and positioned for holding each switch assembly, said projections being integral with the U- shaped mounting means.

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  • Push-Button Switches (AREA)
  • Contacts (AREA)
US00154031A 1971-06-17 1971-06-17 Multiple switch assembly with improved reciprocating leaf spring contact cam actuator Expired - Lifetime US3708635A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US15403171A 1971-06-17 1971-06-17

Publications (1)

Publication Number Publication Date
US3708635A true US3708635A (en) 1973-01-02

Family

ID=22549719

Family Applications (1)

Application Number Title Priority Date Filing Date
US00154031A Expired - Lifetime US3708635A (en) 1971-06-17 1971-06-17 Multiple switch assembly with improved reciprocating leaf spring contact cam actuator

Country Status (6)

Country Link
US (1) US3708635A (fr)
JP (1) JPS542170U (fr)
DE (1) DE2228987A1 (fr)
FR (1) FR2142061B1 (fr)
GB (1) GB1391348A (fr)
IT (1) IT965815B (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2375707A1 (fr) * 1976-12-21 1978-07-21 Ericsson Telefon Ab L M Mecanisme de contact a bouton-poussoir pour circuits imprimes
US4124313A (en) * 1974-08-22 1978-11-07 Kienzle Apparate Gmbh Keyboard assembly
EP0002057A1 (fr) * 1977-11-16 1979-05-30 BROWN, BOVERI & CIE Aktiengesellschaft Mannheim Relais de surcharge thermique
US4186290A (en) * 1977-12-30 1980-01-29 Alps Electric Co., Ltd. Push button switch
US4202640A (en) * 1974-08-22 1980-05-13 Kienzle Apparate Gmbh Keyboard assembly
EP0028000A1 (fr) * 1979-10-30 1981-05-06 Siemens Aktiengesellschaft Interrupteur à bouton-poussoir
EP1329921A3 (fr) * 2002-01-18 2005-06-15 Urmet Domus S.p.A. Contacteur à bouton-poussoir pour activer des signaux d' appel dans des claviers à bouton-poussoir

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2462034C3 (de) * 1974-08-22 1981-10-08 Kienzle Apparate Gmbh, 7730 Villingen-Schwenningen Zum Zusammensetzen von Tastaturen geeignete Taste
DE2738172A1 (de) * 1977-08-24 1979-03-01 Bucher Guyer Ag Masch Antriebsvorrichtung fuer grosse behaelter, insbesondere fuer einen gaer- und/oder entsaftungsbehaelter
DE8517322U1 (de) * 1985-06-13 1986-11-13 Siemens AG, 1000 Berlin und 8000 München Übertragungsvorrichtung für Bedienfelder in Kommunikationsendgeräten
JPS6236649U (fr) * 1985-08-20 1987-03-04

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2748205A (en) * 1951-12-14 1956-05-29 Bryant Electric Co Switch
US2773139A (en) * 1952-11-04 1956-12-04 Bryant Electric Co Switch
US2870273A (en) * 1956-09-24 1959-01-20 Euclid Electric & Mfg Co Electrical switching mechanism
US3218238A (en) * 1961-06-20 1965-11-16 Int Standard Electric Corp Cradle-switch spring assembly

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3030478A (en) * 1959-07-24 1962-04-17 Westinghouse Air Brake Co Circuit controllers
US3377450A (en) * 1966-04-22 1968-04-09 Charles B. Grady Jr. Electric pushbutton leaf spring switch
JPS4512991Y1 (fr) * 1966-08-18 1970-06-04

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2748205A (en) * 1951-12-14 1956-05-29 Bryant Electric Co Switch
US2773139A (en) * 1952-11-04 1956-12-04 Bryant Electric Co Switch
US2870273A (en) * 1956-09-24 1959-01-20 Euclid Electric & Mfg Co Electrical switching mechanism
US3218238A (en) * 1961-06-20 1965-11-16 Int Standard Electric Corp Cradle-switch spring assembly

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4124313A (en) * 1974-08-22 1978-11-07 Kienzle Apparate Gmbh Keyboard assembly
US4202640A (en) * 1974-08-22 1980-05-13 Kienzle Apparate Gmbh Keyboard assembly
FR2375707A1 (fr) * 1976-12-21 1978-07-21 Ericsson Telefon Ab L M Mecanisme de contact a bouton-poussoir pour circuits imprimes
EP0002057A1 (fr) * 1977-11-16 1979-05-30 BROWN, BOVERI & CIE Aktiengesellschaft Mannheim Relais de surcharge thermique
US4186290A (en) * 1977-12-30 1980-01-29 Alps Electric Co., Ltd. Push button switch
EP0028000A1 (fr) * 1979-10-30 1981-05-06 Siemens Aktiengesellschaft Interrupteur à bouton-poussoir
DE2943855A1 (de) * 1979-10-30 1981-05-14 Siemens AG, 1000 Berlin und 8000 München Drucktaste
EP1329921A3 (fr) * 2002-01-18 2005-06-15 Urmet Domus S.p.A. Contacteur à bouton-poussoir pour activer des signaux d' appel dans des claviers à bouton-poussoir

Also Published As

Publication number Publication date
GB1391348A (en) 1975-04-23
IT965815B (it) 1974-02-11
FR2142061A1 (fr) 1973-01-26
JPS542170U (fr) 1979-01-09
FR2142061B1 (fr) 1978-02-10
DE2228987A1 (de) 1972-12-21

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AS Assignment

Owner name: ZENITH ELECTRONICS CORPORATION, GLENVIEW, IL A COR

Free format text: LICENSE;ASSIGNOR:OAK INDUSTRIES, INC.;REEL/FRAME:005164/0006

Effective date: 19881102

AS Assignment

Owner name: ZENITH ELECTRONICS CORPORATION, A CORP OF DELAWARE

Free format text: LICENSE;ASSIGNOR:OAK INDUSTRIES, INC.,;REEL/FRAME:005284/0010

Effective date: 19881102