EP1411400A1 - Befestigungsvorrichtung für ein Koaxialdrehteil in einer Uhr, insbesondere einer Datumanzeigescheibe - Google Patents

Befestigungsvorrichtung für ein Koaxialdrehteil in einer Uhr, insbesondere einer Datumanzeigescheibe Download PDF

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Publication number
EP1411400A1
EP1411400A1 EP02079317A EP02079317A EP1411400A1 EP 1411400 A1 EP1411400 A1 EP 1411400A1 EP 02079317 A EP02079317 A EP 02079317A EP 02079317 A EP02079317 A EP 02079317A EP 1411400 A1 EP1411400 A1 EP 1411400A1
Authority
EP
European Patent Office
Prior art keywords
mobile
coaxial
support member
central support
elastic fingers
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.)
Granted
Application number
EP02079317A
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English (en)
French (fr)
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EP1411400B1 (de
Inventor
Julien Chaignat
Enzo Fullin
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.)
ETA SA Manufacture Horlogere Suisse
Original Assignee
ETA SA Manufacture Horlogere Suisse
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 ETA SA Manufacture Horlogere Suisse filed Critical ETA SA Manufacture Horlogere Suisse
Priority to DE60235015T priority Critical patent/DE60235015D1/de
Priority to EP20020079317 priority patent/EP1411400B1/de
Publication of EP1411400A1 publication Critical patent/EP1411400A1/de
Application granted granted Critical
Publication of EP1411400B1 publication Critical patent/EP1411400B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B13/00—Gearwork
    • G04B13/02—Wheels; Pinions; Spindles; Pivots
    • G04B13/025—Wheels; Pinions; Spindles; Pivots with elastic means between the toothing and the hub of a toothed wheel
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B35/00—Adjusting the gear train, e.g. the backlash of the arbors, depth of meshing of the gears

Definitions

  • the present invention relates generally to the mounting of mobiles coaxial, in particular the mounting of indicator discs (e.g. discs day, date, month or similar indicators), in rooms watchmaking.
  • the present invention relates more particularly to the mounting of such coaxial mobiles by their center on a central support member, and in particular the mounting of a coaxial mobile on a timer mobile of a timepiece.
  • Coaxial mobiles such as indicator discs mounted by their center are commonly retained axially by an additional element, namely a circlip engaged in a groove formed on the periphery of the central support member on which is mounted the disc (typically a shaft, an axis or the barrel of a mobile of timer).
  • This circlip is commonly in the form of an open ring or closed with elastic characteristics allowing its insertion into the throat of the central support member.
  • Document US 3,659,412 shows for example the fixing of a disc indicator on the barrel of a timer mobile (in this case a wheel of hours) and its axial retention by means of different examples of open circlips or closed.
  • the indicator disc is typically attached to a star collaborating with an adequate drive system and that the angular position of the indicator disc is indexed by means of a jumper spring which fits between two teeth of the star.
  • the axial retention of the indicator disc on its member central support is achieved by means of an additional element which increases costs of manufacturing the timepiece and involves an assembly step additional consisting of the introduction of the circlip in the corresponding groove of the central support member.
  • An object of the present invention is to propose a solution making it possible to get rid of the use of an additional retaining element and consequently reduce manufacturing costs and limit the number of assembly steps for the part watchmaking.
  • the present invention thus has for first object a device for fixing a coaxial mobile for a timepiece whose characteristics are set out in the independent claim 1, as well as in independent claim 15.
  • the present invention also relates to a timer mobile intended for receive a coaxial mobile whose characteristics are set out in the independent claim 9.
  • the coaxial mobile is thus retained axially on its member of support by means of a plurality of elastic fingers.
  • elastic fingers make preferably an integral part of the support member.
  • these elastic fingers can be provided on the coaxial mobile itself.
  • the assembly of the coaxial mobile on its support member is also very simple in the sense that it suffices to introduce the mobile on the support member parallel to its axis, the plurality of elastic fingers deforming radially at the passage of the mobile to return then in place is to ensure the axial retention.
  • the figures show a preferred embodiment of a fixing device of a coaxial mobile according to the present invention.
  • the fixing illustrated is intended to ensure the fixing and the retention of an indicator disc of the days, generally designated by the numerical reference 2, on the barrel 11 of a wheel 1 hours of a watch movement.
  • the movement for a timepiece of the type with a central second is partially visible in the section of FIG. 1 and the plan view of FIG. 2 (note that the sections are taken along the section line A-A shown in Figure 2).
  • a gear train 8 and a plate 9 defining a cage in which is the essence of the movement.
  • This drive wheel 42 is located typically engaged with a medium pinion (not shown) secured to a medium wheel (not shown) which meshes with the second pinion 31.
  • the pavement 4 typically transmits its rotational movement to a mobile timer (not shown) which meshes in its terminal part, on the dial side, with the hour wheel 1 via its timer pinion (not shown).
  • the external face of the plate 9 further comprises an annular shoulder 91 serving as a guide radial positioning at the hour wheel 1, itself provided in its base with a corresponding recess to accommodate this shoulder 91.
  • the hour wheel 1, freely mounted for rotation on the roadway 4 also incorporates a return 12 of a drive wheel 5 actuating a date disc 6 with teeth interior as well as the day indicator disc 2.
  • the day 2 indicator disc has a day star 21 attached to a disc 22 carrying the inscriptions of the days of the week, inscriptions which are typically intended to appear successively in a window of the dial (not shown).
  • the disc 22 is not illustrated in the plan view of FIG. 2, only the day star 21 being represented.
  • the disc day indicator 2 is typically operated every day (once per 24 hours), around midnight, via the drive wheel 5 at by means of a finger 51 which is integral with it.
  • This drive wheel 5 is of a type specific of which a further description can be found in the document EP 0 548 659, also on behalf of the present Applicant.
  • the position of the day 2 indicator disc can also be corrected by the through a correction mechanism (typically driven by a crown stem).
  • a corrective wheel 25 forming part of this correction mechanism is illustrated in Figures 1 and 2.
  • the angular position of the disc day indicator 2 is indexed by means of a jumper spring 72, part of which appears in the section of Figure 1.
  • This jumper spring 72 is part of a plate holding 7 which is made integral with the plate 9 and which also incorporates, as illustrated in FIG. 2, a jumper spring 76 for indexing the disc of date 6.
  • FIGS 3a and 3b show enlarged views of the cross-section of the Figure 1, respectively during assembly and after assembly of the indicator disc 2 on the barrel 11 of the hour wheel 1.
  • Figures 4a and 4b show isometric views of this hour wheel 1 and its barrel 11.
  • the barrel 11 of the hour wheel 1 thus carries a plurality, here three, of elastic fingers 15 extending radially outwards from the barrel 11 and intended for ensure axial retention of the indicator disc 2 on the barrel 11.
  • These fingers elastic bands 15 are preferably arranged symmetrically around the barrel 11 (in this example at 120 ° from each other).
  • the elastic fingers 15 are arranged to be deform elastically inward of the barrel 11 to allow a axial insertion of the indicator disc 2, through its central mounting hole 2a, on the canon 11 of the hour wheel 1.
  • Figures 3a and 3b are used to highlight evidence what has just been mentioned. Indeed, as illustrated in Figure 3a, when of the insertion of the indicator disc 2, the day star 21 comes into contact with the end of the fingers 15 so that they are forced to deform radially towards the axis of the hour wheel 1. Once the disc 2 is inserted, as illustrated in the Figure 3b, the fingers 15 return to their rest position to retain axially disc 2 by its star of days 21. In this position, we will understand obviously that the indicator disc 2 is free to rotate around the barrel 11.
  • the configuration of the barrel 11 of the wheel of the hours 1, according to the preferred embodiment, is such that this barrel 11 has a end part 11 a intended for the introduction of an hour hand (not shown), a first middle portion 11 b where the elastic fingers are arranged 15, a second middle portion 11c of substantially similar diameter (but lower) than the diameter of the mounting hole 2a of the day 2 indicator disc and around which this indicator disc rests radially, and a bearing 11d on which axially rests the indicator disc for days 2 (this range 11 d is here formed by the face of the reference 12 of the date wheel).
  • the second middle part 11c housing the day 2 indicator disc has a plurality of recesses radial 16, in a number equivalent to the number of elastic fingers, formed in positions angularly corresponding to the positions of the elastic fingers 15. From the so, once mounted, the 2 days disc rests directly on the second part middle 11 c, rigid, the elastic fingers 15 returning to their rest position a the indicator disc 2 inserted to ensure its axial retention.
  • the elastic fingers 15 extend radially from the barrel 11 over a distance slightly greater than the corresponding radius of the mounting hole 2a of the indicator disc 2 so as to ensure, in the rest position, the axial retention of the disc 2.
  • These elastic fingers 15 must moreover be sufficiently flexible so that they deform when the disc is inserted and allow the passage of this latest.
  • the radial recesses 16 extend as illustrated towards the base of the hour wheel 1.
  • the hour wheel, or generally the central support member of the indicator disc is preferably made in one synthetic material, such as plastic.
  • the illustrated configuration of the recesses radials 16 makes it possible to simplify the construction of the mold of the wheel of the hours 1. Note, however, that the use of a plastic material is not compulsory, any material with sufficient elastic characteristics to the desired goal can be used.
  • the first middle part 11b of the barrel 11 of the wheel hours 1 further preferably comprises a plurality of radial guides 17 (also three in this example) arranged between the elastic fingers 15 to guide the indicator disc 2 when it is inserted on the hour wheel 1.
  • These guides 17 ensure good radial positioning of the indicator disc 2 during its insertion and also protect the elastic fingers 15 of the wheel from hours so that they undergo only minimal deformation when inserting the indicator disc 2.
  • these radial guides 17 are arranged so they are the first to come into contact with the indicator disk 2 when it insertion. More precisely, the radial guides 17 as well as the elastic fingers 15 have, in their upper part, a chamfer whose angle differs.
  • the angle of the chamfer made on the radial guides 17 is less important (relative to a perpendicular to the axis of insertion of the indicator disc) than the angle of the chamfer on the flexible fingers.
  • the disc indicator is first of all guided and centered on the axis by the guides 17 (cf. FIG. 3a) before actually coming into contact with the elastic fingers 15. Others configuration can obviously be considered. Guides 17 can thus simply be placed higher on the barrel 11 of the hour wheel 1.
  • the present invention is not limited only to the fixing of a disc of the days and its star on the barrel of a wheel hours, but applies analogously to allow the fixation of any other coaxial mobile to be mounted on a central support member such as a mobile timer or any other support element, whether fixed or mobile.
  • a central support member such as a mobile timer or any other support element, whether fixed or mobile.
  • the invention is not limited to the attachment of a disc day indicator, but may apply to any other type of indicator disc mounted by its center on a central support member, such as for example a disc of dates, months, or even moon phases.
  • the plurality of elastic fingers would extend radially inward from the coaxial mobile (i.e. towards the axis of rotation of the assembly), these elastic fingers being similarly arranged to deform elastically to allow a axial insertion of the coaxial mobile on the central support member and to return to a rest position to ensure axial retention of the coaxial mobile.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
EP20020079317 2002-10-16 2002-10-16 Befestigungsvorrichtung für ein Koaxialdrehteil in einer Uhr, insbesondere einer Datumanzeigescheibe Expired - Lifetime EP1411400B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE60235015T DE60235015D1 (de) 2002-10-16 2002-10-16 Befestigungsvorrichtung für ein Koaxialdrehteil in einer Uhr, insbesondere einer Datumanzeigescheibe
EP20020079317 EP1411400B1 (de) 2002-10-16 2002-10-16 Befestigungsvorrichtung für ein Koaxialdrehteil in einer Uhr, insbesondere einer Datumanzeigescheibe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20020079317 EP1411400B1 (de) 2002-10-16 2002-10-16 Befestigungsvorrichtung für ein Koaxialdrehteil in einer Uhr, insbesondere einer Datumanzeigescheibe

Publications (2)

Publication Number Publication Date
EP1411400A1 true EP1411400A1 (de) 2004-04-21
EP1411400B1 EP1411400B1 (de) 2010-01-06

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EP20020079317 Expired - Lifetime EP1411400B1 (de) 2002-10-16 2002-10-16 Befestigungsvorrichtung für ein Koaxialdrehteil in einer Uhr, insbesondere einer Datumanzeigescheibe

Country Status (2)

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EP (1) EP1411400B1 (de)
DE (1) DE60235015D1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2317406A1 (de) * 2009-10-29 2011-05-04 Nivarox-FAR S.A. System zum Befestigen eines Teils ohne Eintreiben oder Kleben

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3907564A1 (de) * 2020-05-05 2021-11-10 ETA SA Manufacture Horlogère Suisse Indexierungselement für uhren

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH46864A (fr) * 1909-05-03 1910-04-16 Graizely & Cie Dispositif d'ajustement à frottement gras d'un renvoi de transmission sur l'arbre d'un mobile de mouvement d'horlogerie
US3659412A (en) * 1969-06-26 1972-05-02 Citizen Watch Co Ltd Positioner for calendar dial in timepiece
FR2391502A1 (fr) * 1977-05-20 1978-12-15 Seiko Instr & Electronics Mouvement d'horlogerie portatif avec un mecanisme de calendrier
EP0838735A2 (de) * 1992-12-02 1998-04-29 Seiko Epson Corporation Räderwerk für eine elektronische Uhr

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH46864A (fr) * 1909-05-03 1910-04-16 Graizely & Cie Dispositif d'ajustement à frottement gras d'un renvoi de transmission sur l'arbre d'un mobile de mouvement d'horlogerie
US3659412A (en) * 1969-06-26 1972-05-02 Citizen Watch Co Ltd Positioner for calendar dial in timepiece
FR2391502A1 (fr) * 1977-05-20 1978-12-15 Seiko Instr & Electronics Mouvement d'horlogerie portatif avec un mecanisme de calendrier
EP0838735A2 (de) * 1992-12-02 1998-04-29 Seiko Epson Corporation Räderwerk für eine elektronische Uhr

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2317406A1 (de) * 2009-10-29 2011-05-04 Nivarox-FAR S.A. System zum Befestigen eines Teils ohne Eintreiben oder Kleben
EP2317407A1 (de) * 2009-10-29 2011-05-04 Nivarox-FAR S.A. System zum Befestigen eines Teils ohne Eintreiben oder Kleben
US8636405B2 (en) 2009-10-29 2014-01-28 Nivarox-Far S.A. System for securing a part without driving in or bonding

Also Published As

Publication number Publication date
DE60235015D1 (de) 2010-02-25
EP1411400B1 (de) 2010-01-06

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