US3567891A - Contact assembly for sliding switches - Google Patents

Contact assembly for sliding switches Download PDF

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Publication number
US3567891A
US3567891A US850924A US3567891DA US3567891A US 3567891 A US3567891 A US 3567891A US 850924 A US850924 A US 850924A US 3567891D A US3567891D A US 3567891DA US 3567891 A US3567891 A US 3567891A
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US
United States
Prior art keywords
contact
slide
chamber
contact bridge
sides
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
US850924A
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English (en)
Inventor
Rudolf Hinkelmann
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.)
Preh GmbH
Original Assignee
Preh GmbH
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 Preh GmbH filed Critical Preh GmbH
Application granted granted Critical
Publication of US3567891A publication Critical patent/US3567891A/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
    • 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
    • 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

Definitions

  • This invention relates to contact assemblies for sliding switches, such as are used, for example, in radio and television sets.
  • An object of the present invention is to devise contact assembly having a contact bridge which, in manufacture, need be subjected only to a comparatively slight deformation by bending in the operative spring regions.
  • Another object is to devise a contact assembly having a contact bridge which has a very small spacing of the contact points for the two countercontacts, and relatively long spring regions.
  • a contact assembly for a sliding switch having a contact bridge made in one piece and disposed in a chamber in a slide for cooperation with relatively fixed contacts spaced one from another in the direction of sliding movement of the contact bridge, in which said contact bridge comprises a substantially rectangular frame having shorter sides formed integrally with inwardly directed convex contact arms arranged to cooperate with the relatively fixed contacts, in which said frame has long sides being provided midway with recesses engaged by projections of the chamber walls, and in which middle regions of the frames long sides rest on ledges provided in and at opposite sides of the chamber.
  • the effective spring path always extends from the point of support over onehalf of the long side of the frame, in this operative position there occurring not only bending stress but also torsional stress over half the transverse side to the arched contact arm, the latter also contributing to the'creation of contact pressure by elastic bending deformation.
  • the contact arms only being one-sidedly arched, while the essential spring regions, the long sides, undergo no deformation or very little deformation only during the manufacturing of the bridge, so that the original spring properties of the semimanufactured product remain unchanged.
  • the contact bridge Due to the completely closed frame, the contact bridge represents a compact, robust spring element which is easily mountable, even in very small executions.
  • the supporting points of the countercontacts lie very closely adjacent each other on the inwardly directed contact arms, so that the countercontacts may alsobe moved towards each other to the necessary minimum spacing required by voltage safety. By this, it is not only possible to achieve a short stroke, but also even in switches having several changeover contacts, a small overall depth.
  • this contact bridge Since the frames longitudinal sides are only supported in the middle, this contact bridge has the properties of a rocker, by which also the contact pressures are balanced even in the event of nonuniform position of the counter contact.
  • the contact bridge In the assembled condition of the slide, the contact bridge is held in the chamber by bearing resiliently on the counter contacts. So as the to prevent the contact bridges also when the slide is fitted with the contact bridges from falling out of the chamber, it is proposed in a further development of the contact assembly to deform plastically on their end faces the projections engaging the recesses in the longitudinal sides of the frame. This deformation takes, however, only place to such an extent that a certain rocking movement of the contact bridge on its supporting ledges or banks is retained.
  • the contact bridge may be made, as known per se, of spring band with a noble metal coating, preferably a silver coating.
  • two contact systems may be accommodated in mirror-image fashion on opposite sides of the slide, whereby there is obtained at the same time a two-sided, mutually balancing resilient guide of the slide in the stationary part of the switch.
  • FIG. I shows part of a switching slide for a slide switch, the switch having one fitted and one unfitted chamber
  • FIG. 2 represents a section through the slide along the central plane of a chamber
  • FIGS. 3 and 4 show a plan view and a side elevation respectively, of the contact bridge
  • FIG. 5 shows diagrammatically the contact assembly in part of a slide switch.
  • the slide 1 part of which is shown in FIG. 1, is made of a plastics material and is provided on both sides of its longitudinal axis with shallow chambers 2. Both the longitudinal sidewalls of the chambers have in the middle thereof semicylindrical supporting banks or ledges 3, 3', above which there are provided likewise semicylindrical projections 4, 4 of somewhat smaller diameter.
  • FIGS. 3 and 4 show, on a greatly enlarged scale, a contact bridge for the sliding switch, this contact bridge being made of silver-plated bronze strip or band. It comprises a rectangular frame with outer rounded-off corners, the longitudinal sides 5, 5' of which being formed at the middle with semicircular recesses 6, 6. Contact arms 8, 8, directed inwardly towards the middle of the frame and arched towards the same side, are cut into the transverse sides 7, 7 of the frame.
  • the contact bridge is so dimensioned that its outer contour fits with a certain clearance into the rectangular chamber 2 of slide 1.
  • the contact bridge is inserted into the chamber so that the middle regions of the longitudinal sides 5, 5 rest on the ledges or banks 3, 3 of chamber 2 and that the projections 4, 4' engage the recesses 6, 6 with a tight fit.
  • the end faces of the projections 4, 4' are slightly thermoplastically deformed so as to prevent the bridge from falling off the supporting ledges 3, 3' by its own weight, while retaining such mobility that it can perform a certain tilting or rocking movement on the said banks.
  • FIG. 5 shows part of a slide switch having a slide according to FIG. 1 fitted with contact bridges inserted into a chamberlike switch casing, the latter having its walls provided with stationary counter contacts 10a, 10b, 10e, l0a, l0b, l0'c.
  • the prearched contact arms 8, 8, initially projecting beyond the profile of the slide are pressed back in resiliently deforming the contact bridge, so that the contact arms to rest with pretension on the counter contacts.
  • the contact pressure between arms 8, 8 is substantially balanced or equalized by the rockerlike mounting of the bridge on the supporting banks, even in the case of deviating position of the counter contacts.
  • the individual slide switches may conventionally be provided with several contact assemblies arranged one after the other, and several such switches may be combined by known means to form a switch unit for mutual release of the individual slides.
  • a contact assembly for a slide switch a casing, a slide slidingly arranged in said casing, said slide providing a chamber; fixed contacts spaced from one another in the direction of sliding movement of said slide and attached to said casing; a contact bridge located in said chamber and adapted to cooperate with said fixed contacts; said contact bridge comprising a substantially rectangular frame; longitudinal sides and shorter sides on said frame; said shorter sides formed integrally with inwardly directed arched contact arms adapted to cooperate with said fixed contacts; said longitudinal sides of said frame provided midway along their length with recesses engaged by projections of said chamber walls; midregions of said longitudinal sides resting on ledges formed on opposite sides of said chamber.
  • a contact assembly comprising a plurality of contact bridges which are arranged in mirrorimage fashion on opposite sides of said slide.
US850924A 1968-08-29 1969-08-18 Contact assembly for sliding switches Expired - Lifetime US3567891A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1790026A DE1790026C3 (de) 1968-08-29 1968-08-29 Kontaktsystem für Schiebeschalter

Publications (1)

Publication Number Publication Date
US3567891A true US3567891A (en) 1971-03-02

Family

ID=5706847

Family Applications (1)

Application Number Title Priority Date Filing Date
US850924A Expired - Lifetime US3567891A (en) 1968-08-29 1969-08-18 Contact assembly for sliding switches

Country Status (8)

Country Link
US (1) US3567891A (fr)
JP (1) JPS4844517B1 (fr)
AT (1) AT280391B (fr)
DE (1) DE1790026C3 (fr)
DK (1) DK128084B (fr)
FR (1) FR1589034A (fr)
GB (1) GB1211785A (fr)
NL (1) NL6814401A (fr)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4852075U (fr) * 1971-10-16 1973-07-06
US3747044A (en) * 1971-08-19 1973-07-17 Rca Corp Microwave integrated circuit (mic) ground plane connector
US3775575A (en) * 1972-06-30 1973-11-27 Alarm Products Int Inc Switch for connecting window foil with a burglar alarm circuit
US3783204A (en) * 1972-09-11 1974-01-01 Oak Industries Inc Multiple circuit control pushbutton switch assembly with improved pushbutton actuator latch bar mechanism and movable contacts
JPS4992975U (fr) * 1972-12-01 1974-08-12
US3857008A (en) * 1972-08-11 1974-12-24 Philips Corp Alternate make-break type slide switch with improved movable contact
US4001526A (en) * 1974-07-12 1977-01-04 Molex Incorporated Alternate action switch
US4064385A (en) * 1974-10-28 1977-12-20 Evg Entwicklungs-U. Verwertungs-Gesellschaft M.B.H. Multipoint mesh welding machine
US4075441A (en) * 1975-04-07 1978-02-21 U.S. Philips Corporation Slide switch having resilient movable contact arm twisted to provide efficient electrical connection
US4137440A (en) * 1976-07-07 1979-01-30 Bryant Manufacturing Pty. Limited Electrical switch
US4163135A (en) * 1978-01-30 1979-07-31 The United States Of America As Represented By The Secretary Of The Navy High current switches using multi-louvered contact strips
US4393281A (en) * 1979-04-20 1983-07-12 Matsu Kyu Kabushiki Kaisha Dip switch
US5744764A (en) * 1996-09-26 1998-04-28 General Signal Corporation Modular de-energized switch for transformer tap changing
US6064016A (en) * 1998-08-04 2000-05-16 Itt Manufacturing Enterprises, Inc. Wiper switch terminal and contact
US20040222075A1 (en) * 2003-05-05 2004-11-11 Honda Giken Kogyo Kabushiki Kaisha Switch assembly for a sunroof
US20090247706A1 (en) * 2004-10-11 2009-10-01 Rayner Krista Continuous extrusion process for producing grafted polymers
US10559440B2 (en) 2016-03-30 2020-02-11 Shanghai Yanfeng Jinqiao Automotive Trim Systems Co. Ltd. Switch mechanism for a vehicle interior component

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8219038U1 (de) * 1982-07-02 1982-10-07 Siemens AG, 1000 Berlin und 8000 München Elektrischer Schleifkontakt für Leiterbahnen
EP0935270B1 (fr) * 1998-02-07 2003-09-03 Niles Parts Co., Ltd. Interrupteur à curseur
DE10120298A1 (de) * 2001-04-25 2002-11-07 Delphi Tech Inc Elektrischer Schalter

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3747044A (en) * 1971-08-19 1973-07-17 Rca Corp Microwave integrated circuit (mic) ground plane connector
JPS4852075U (fr) * 1971-10-16 1973-07-06
US3775575A (en) * 1972-06-30 1973-11-27 Alarm Products Int Inc Switch for connecting window foil with a burglar alarm circuit
US3857008A (en) * 1972-08-11 1974-12-24 Philips Corp Alternate make-break type slide switch with improved movable contact
US3783204A (en) * 1972-09-11 1974-01-01 Oak Industries Inc Multiple circuit control pushbutton switch assembly with improved pushbutton actuator latch bar mechanism and movable contacts
JPS5319972Y2 (fr) * 1972-12-01 1978-05-26
JPS4992975U (fr) * 1972-12-01 1974-08-12
US4001526A (en) * 1974-07-12 1977-01-04 Molex Incorporated Alternate action switch
US4064385A (en) * 1974-10-28 1977-12-20 Evg Entwicklungs-U. Verwertungs-Gesellschaft M.B.H. Multipoint mesh welding machine
US4075441A (en) * 1975-04-07 1978-02-21 U.S. Philips Corporation Slide switch having resilient movable contact arm twisted to provide efficient electrical connection
US4137440A (en) * 1976-07-07 1979-01-30 Bryant Manufacturing Pty. Limited Electrical switch
US4163135A (en) * 1978-01-30 1979-07-31 The United States Of America As Represented By The Secretary Of The Navy High current switches using multi-louvered contact strips
US4393281A (en) * 1979-04-20 1983-07-12 Matsu Kyu Kabushiki Kaisha Dip switch
US5744764A (en) * 1996-09-26 1998-04-28 General Signal Corporation Modular de-energized switch for transformer tap changing
US6064016A (en) * 1998-08-04 2000-05-16 Itt Manufacturing Enterprises, Inc. Wiper switch terminal and contact
US20040222075A1 (en) * 2003-05-05 2004-11-11 Honda Giken Kogyo Kabushiki Kaisha Switch assembly for a sunroof
US6891114B2 (en) 2003-05-05 2005-05-10 Honda Giken Kogyo Kabushiki Kaisha Switch assembly for a sunroof
US20090247706A1 (en) * 2004-10-11 2009-10-01 Rayner Krista Continuous extrusion process for producing grafted polymers
US10559440B2 (en) 2016-03-30 2020-02-11 Shanghai Yanfeng Jinqiao Automotive Trim Systems Co. Ltd. Switch mechanism for a vehicle interior component

Also Published As

Publication number Publication date
DE1790026B2 (de) 1979-01-18
DE1790026C3 (de) 1979-09-20
DE1790026A1 (de) 1971-12-02
GB1211785A (en) 1970-11-11
JPS4844517B1 (fr) 1973-12-25
FR1589034A (fr) 1970-03-16
DK128084B (da) 1974-02-25
NL6814401A (fr) 1970-03-03
AT280391B (de) 1970-04-10

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