EP0225277B1 - Elektrische Kontaktvorrichtung für Uhren - Google Patents

Elektrische Kontaktvorrichtung für Uhren Download PDF

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Publication number
EP0225277B1
EP0225277B1 EP86810423A EP86810423A EP0225277B1 EP 0225277 B1 EP0225277 B1 EP 0225277B1 EP 86810423 A EP86810423 A EP 86810423A EP 86810423 A EP86810423 A EP 86810423A EP 0225277 B1 EP0225277 B1 EP 0225277B1
Authority
EP
European Patent Office
Prior art keywords
tongue
branches
contact
switch according
constituted
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
Application number
EP86810423A
Other languages
English (en)
French (fr)
Other versions
EP0225277A1 (de
Inventor
Norbert Perucchi
Manfred Pekari
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0225277A1 publication Critical patent/EP0225277A1/de
Application granted granted Critical
Publication of EP0225277B1 publication Critical patent/EP0225277B1/de
Expired legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
    • G04C3/001—Electromechanical switches for setting or display
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C21/00—Producing acoustic time signals by electrical means
    • G04C21/16—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times
    • G04C21/20—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times by closing a contact to ring an electromechanical alarm
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
    • H01H19/54—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand the operating part having at least five or an unspecified number of operative positions
    • H01H19/56—Angularly-movable actuating part carrying contacts, e.g. drum switch
    • H01H19/58—Angularly-movable actuating part carrying contacts, e.g. drum switch having only axial contact pressure, e.g. disc switch, wafer switch
    • H01H19/585—Angularly-movable actuating part carrying contacts, e.g. drum switch having only axial contact pressure, e.g. disc switch, wafer switch provided with printed circuit contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2300/00—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H
    • H01H2300/016—Application timepiece

Definitions

  • the object of the present invention is to produce a particularly thin electrical switch which does not create disturbing torques on its axis and which is particularly intended for controlling time functions. This object is achieved according to the characterizing part of claim 1.
  • Each switch has a contact blade 1 having two branches 1 a and 1b, the two branches being provided at their ends with a contact 2.
  • the blade 1 has a hole in the center, and its central part is embedded between a mobile 3 having a toothing 4 and a barrel 5.
  • the parts 1 - 5 are mounted at a predetermined distance from a metal disc 6 illustrated diagrammatically in FIG . 3 covered with a disc of insulating material 7 inside, with the exception of an island 8 which extends radially inwards. It is clearly visible especially in fig.
  • the contact 2a is likely to come into contact with the conductive island 8 of the disc 6, while the contact 2b is always located on the insulating part 7.
  • the switch is therefore closed when the contact 2a slides. on the island 8 during the rotation of the contact blade 1 with the mobile 3 which is for example the hour wheel.
  • Fig. 2 shows the shape of the contact blade 1 without external load, that is to say before mounting.
  • Fig. 3 shows the position and shape of the contact blade after assembly of the device.
  • FIGS. 5 and 6 differs from the embodiment according to FIGS. 1 to 3 by the fact that the section of the contact blade 1 is weakened at the location of the embedding of its arms by holes 9a resp. 9b. It is accepted that the almost circular central part of the contact blade 1 is practically rigid and that the elastic deformation of the contact blade in its assembled state is practically limited to the arms. It is clear from fig. 5 that the hole 9a in the longer arm 1a is smaller than the hole 9b in the arm 1b. That is to say that the weakening of the section respectively of the moment of inertia of the blade 1a is less than the weakening of the blade 2b.
  • the solution illustrated can be provided by the introduction of a shorter blade, the friction path of which passes outside the contact 8. If the two blades have, apart from their length, all other identical characteristics, the shorter will exert, for the same deformation, a different bearing force than that of the longer. There is therefore partial compensation and the problem mentioned above is only slightly or not improved.
  • a solution valid only in a well-defined case, can be found by arranging blades of identical section in such a way that, for the nominal working conditions, the respective arrows f are different, the couples c being, themselves, identical.
  • Fig. 3 shows the contact spring of FIGS. 1 and 2 in its working position. It is noted that, due to the deformation due to the reinforcement, the points of contact with the disc may not be those which have been provided.
  • the application of formula 1 above makes it possible to theoretically trace the shapes of the deformed blades and to be convinced that, especially in the case of small thicknesses, the fulcrum can vary greatly, for small differences in total height.
  • a weakening in a given zone causes, as one can be convinced by applying formula 2, greater deformation in this zone. This deformation is all the greater as the weakening is carried out at the places where the stress is greater, the maximum being achieved for a weakening during the embedding.
  • a contact blade could be provided with more than two arms, but symmetrical in the sense that total compensation for the torques acting on the axis is obtained.
  • the branch section weakening or shrinking can be achieved by other measures.
  • circular holes it is advantageous to provide oblong holes situated substantially in the middle of the width of the branches. It is also possible to provide for narrowing by reducing the thickness of the blade in the vicinity of the embedding.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Switches With Compound Operations (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)

Claims (6)

1. Elektrischer Schalter mit einem kreisförmigen, flachen und dünnen Kontakt, welcher um eine Achse drehbar ist, bestehend aus einer teilweise isolierten Scheibe (6) und mindestens einer Zunge (1), die auf die genannte Scheibe aufliegt und darauf schleift, wobei die Zunge zwei Arme (1a, 1b) aufweist, die sich bei verschiedenen Radien auf die Scheibe abstützen, dadurch gekennzeichnet, dass die Arme der Zunge in der Nähe ihrer Einspannstellen eine Querschnittsverminderung aufweisen, derart, dass wenn sie sich in Arbeitsstellung befinden, ihre Profile im wesentlichen Geraden sind und die Resultierende der Momente, die Drehungen in die Achse (A) enthaltenen Ebenen zu verursachen suchen, im wesentlichen Null ist.
2. Schalter nach Anspruch 1, dadurch gekennzeichnet, dass die Querschnittsverminderungen der Arme (1a, 1b) durch Löcher (9a, 9b), die im wesentlichen in der Mitte der Breite der Arme angeordnet sind, realisiert sind.
3. Schalter nach Anspruch 1, dadurch gekennzeichnet, dass die Querschnittsverminderungen der Arme durch eine längliche Öffnung, die im wesentlichen in der Mitte der Armbreite angeordnet ist, realisiert sind.
4. Schalter nach Anspruch 1, dadurch gekennzeichnet, dass die Verminderungen durch Herabsetzung der Dicke der Zunge in der Nähe ihrer Einspannungen realisiert sind.
5. Schalter nach Anspruch 2, dadurch gekennzeichnet, dass die genannten Löcher (9a, 9b) aus kreisförmigen Ausschnitten bestehen, wobei derjenige (9a) der Verlängerung (1b) einen leicht grösseren Durchmesser hat gegenüber demjenigen (9a) des Teils (1a) der Zunge, welcher den Kontakt (2a) trägt.
6. Verwendung des Schalters gemäss Anspruch 1 in einer Armbanduhr mit einer Vorrichtung, die zu einem nach Wunsch einstellbaren Zeitpunkt durch Schluss dieses Schalters in Aktion treten kann, wobei die genannte Scheibe und die genannte Zunge beide um dieselbe Achse drehbar angeordnet sind, wobei einer dieser beiden Teile mit einem den Zeitpunkt des Inaktiontretens der Vorrichtung anzeigenden Organ und der andere mit dem Stundenrad der Uhr fest verbunden ist derart, dass er synchron mit diesem Rad in Drehung versetzt wird, und wobei die Scheibe auf dem Weg des durch die Zunge getragenen Kontaktes mit Ausnahme der Stelle des daran angebrachten Kontaktes isoliert ist.
EP86810423A 1985-10-04 1986-09-26 Elektrische Kontaktvorrichtung für Uhren Expired EP0225277B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH431185 1985-10-04
CH4311/85 1985-10-04

Publications (2)

Publication Number Publication Date
EP0225277A1 EP0225277A1 (de) 1987-06-10
EP0225277B1 true EP0225277B1 (de) 1989-11-23

Family

ID=4273715

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86810423A Expired EP0225277B1 (de) 1985-10-04 1986-09-26 Elektrische Kontaktvorrichtung für Uhren

Country Status (4)

Country Link
US (1) US4780583A (de)
EP (1) EP0225277B1 (de)
DE (1) DE3667112D1 (de)
HK (1) HK108390A (de)

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1739003A (en) * 1927-12-06 1929-12-10 Addison R Klingensmith Combination lock switch
US1820937A (en) * 1928-01-09 1931-09-01 Mildred M Daniels Burglar alarm switch device
DE638269C (de) * 1934-05-30 1936-11-12 Siemens & Halske Akt Ges Drehschalter, insbesondere fuer Messzwecke, mit einer feststehenden Achse und einem um diese drehbaren Tragkoerper fuer auf flachen Kontaktbahnen schleifende Stromabnehmer
GB456625A (en) * 1935-02-19 1936-11-12 Cinch Mfg Corp Improvements in and relating to electrical switches of the selector type
US2079003A (en) * 1936-07-08 1937-05-04 Dewar Mfg Company Electric switch device
US2340615A (en) * 1942-03-20 1944-02-01 Radio Patents Corp Snap action device
US2701475A (en) * 1950-04-17 1955-02-08 Honeywell Regulator Co Snap acting device
US3024334A (en) * 1958-09-12 1962-03-06 Hurletron Inc Ball contacting device
DE1215800B (de) * 1960-11-11 1966-05-05 Joseph Gisiger Staehli Steuergeraet
GB1200889A (en) * 1966-12-09 1970-08-05 Lucas Industries Ltd Means for making an electrical connection to a flexible printed circuit
US3611702A (en) * 1969-05-08 1971-10-12 Paolo Spadini Electric alarm timepiece
US3801753A (en) * 1969-06-17 1974-04-02 Gaf Corp Dial type wafer printed circuit switch
GB1391637A (en) * 1971-12-27 1975-04-23 Suwa Seikosha Kk Electronic timepieces and electronic calculators
JPS5246123Y2 (de) * 1972-06-09 1977-10-20
US3869586A (en) * 1974-03-28 1975-03-04 Cutter Hammer In Miniature wrist watch switch
US3970986A (en) * 1975-01-30 1976-07-20 Motorola, Inc. Thick film rotary switch
US4199930A (en) * 1978-01-19 1980-04-29 The Gillette Company Alarm switch for an alarm circuit in a horological device
US4400597A (en) * 1982-02-16 1983-08-23 Eeco Incorporated Axial cam rotary switch

Also Published As

Publication number Publication date
US4780583A (en) 1988-10-25
DE3667112D1 (en) 1989-12-28
EP0225277A1 (de) 1987-06-10
HK108390A (en) 1990-12-28

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