EP1870784A2 - Mikromechanische Triebfeder mit durch Stöße geregelter Drehung - Google Patents

Mikromechanische Triebfeder mit durch Stöße geregelter Drehung Download PDF

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Publication number
EP1870784A2
EP1870784A2 EP07110433A EP07110433A EP1870784A2 EP 1870784 A2 EP1870784 A2 EP 1870784A2 EP 07110433 A EP07110433 A EP 07110433A EP 07110433 A EP07110433 A EP 07110433A EP 1870784 A2 EP1870784 A2 EP 1870784A2
Authority
EP
European Patent Office
Prior art keywords
mobile
arms
teeth
rotation
wheel
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
EP07110433A
Other languages
English (en)
French (fr)
Other versions
EP1870784B1 (de
EP1870784A3 (de
Inventor
Philippe Marmy
Benjamin Kraehenbuehl
Thierry Conus
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.)
Omega SA
Original Assignee
Omega SA
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 Omega SA filed Critical Omega SA
Priority to EP20070110433 priority Critical patent/EP1870784B1/de
Publication of EP1870784A2 publication Critical patent/EP1870784A2/de
Publication of EP1870784A3 publication Critical patent/EP1870784A3/de
Application granted granted Critical
Publication of EP1870784B1 publication Critical patent/EP1870784B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • G04B15/00—Escapements
    • G04B15/06—Free escapements
    • G04B15/08—Lever escapements
    • 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
    • G04B15/00—Escapements
    • G04B15/14—Component parts or constructional details, e.g. construction of the lever or the escape wheel

Definitions

  • the present invention relates to a micromechanical mobile, and in particular a wheel or pinion, the rotation of which is controlled by shocks at the teeth disposed at its periphery.
  • the invention will be more particularly illustrated by an escapement wheel of a balance-sprung system of a mechanical watch movement.
  • the escapement of a mechanical watch movement comprises a more or less complex set of parts, including an escape wheel whose regularly spaced teeth undergo the shock of pallets generally in rubies.
  • the shape of this wheel shown in Figure 2 has almost never changed. It comprises a rigid central zone 2 provided with an opening 4 for driving on a shaft, a rigid serge 12 provided with teeth 8, and generally four arms 6 also rigid, which leads to a rigid part. Improvements have focused on the number or shape of teeth in particular to facilitate lubrication and reduce wear. Licences CH 230 743 and DE 1,192,984 describe for example embodiments in which the teeth have notches for forming oil reservoirs.
  • the material used to make such escape wheels is almost always a metal or an alloy. However, this does not totally exclude the risk of damaging the teeth in case of violent shocks. This risk is further increased if the metal is replaced by a more shock-sensitive material.
  • the present invention therefore aims to overcome the disadvantages of the prior art by providing a mobile whose rotation is controlled by shocks on teeth designed so that they are not damaged by said shocks.
  • the invention relates to such a mobile comprising a central zone of a rigid material, and arms extending radially from the central zone to a peripheral zone comprising teeth, the arms being flexible to allow a small tangential displacement and / or radial teeth to absorb shocks likely to damage said teeth.
  • the invention is characterized in that that the arms are curved and gradually bend towards an orientation tangential to the rotation of the mobile, in that the thickness of the arms decreases and finally, in that the teeth are formed by the ends of the arms.
  • the arms are bent in the direction of rotation of said mobile.
  • the arms are bent in the direction opposite to the direction of rotation of said mobile, while at the end of the arms, the teeth are bent in the direction of rotation of said mobile.
  • the rigid central portion preferably comprises an opening for driving a shaft for rotating the mobile. This rotation can also be carried out by means of pivots coming from material with the rigid central zone.
  • the "mobile” will be more particularly illustrated by the escapement wheel of the balance-sprung system of a clockwork mechanical movement in which the teeth undergo shocks of pallets generally ruby.
  • the present invention will be more particularly illustrated by a coaxial anchor escapement in which the teeth of the escape wheel are subjected to the shocks of the pallets.
  • this mechanism comprises a first escape wheel 1 and a second escape wheel 11, also called an impulse pinion, mounted on the same axis 3.
  • the two escape wheels are integral in rotation and they have the same number of teeth.
  • the first escape wheel 1 has the form shown in Figure 2, that is to say the shape of a conventional Swiss lever escapement wheel.
  • the pinion gear 11 also acts as an escape pinion 15 meshing with an intermediate wheel 17, which has the advantage of reducing the height of the mechanism.
  • the large plate 19 of the balance carries a plate pin 21 and a direct pulse pallet 23 arranged to cooperate with the teeth 8 of the first escape wheel 1.
  • the anchor 25, whose fork 27 cooperates with the ankle plate 21, comprises an indirect pulse pallet 24 which cooperates with the teeth 13 of the second escape wheel 11, as well as two pallets of rest 26, 28, respectively inlet and outlet, which cooperate with the teeth 8 of the first escape wheel 1.
  • the construction of such a coaxial escapement requires tight tolerances, so that such an exhaust is mainly reserved for high-end timepieces.
  • the present invention is innovative in that the teeth have a certain flexibility radially and tangentially so as to absorb shocks.
  • Figure 3 corresponds to the escape wheel 1 shown in Figures 5 and 6, to explain the operation of a coaxial escapement, and corresponds to a first embodiment.
  • the arms 6 are curved and gradually bend towards a tangential orientation, in the direction of rotation of the mobile.
  • the arms 6 are relatively thin given their length, which gives them some flexibility.
  • the wheel 1 has no serge, the teeth 8 being constituted by the ends of the arms 6.
  • the absence of serge has the advantage of giving each arm 6 the ability to flex independently of other arms. Since the arms 6 are not simply oriented radially like the wheel arms of the prior art, they have the possibility of flexing radially as well as tangentially.
  • the configuration of the arms that "roll up" around the wheel makes it possible to have longer arms for a wheel of a given diameter.
  • the curvature of the arms 6 is progressive so as to distribute the tensions caused by a shock throughout the length of the arms.
  • the thickness of the arms decreases as we approach their end. Indeed, it will be understood that, in the configuration shown, the shear stresses are greater at the birth of the arms than at their end. Under these conditions, the progressive thinning of the arms makes it possible to reconcile the contradictory imperatives of flexibility and solidity.
  • the escape wheel 1 has eight arms 6 and as many teeth 8. It is obvious that one could have another number of arms and teeth.
  • Figure 4 corresponds to a second embodiment. It differs from the previous mode in that the arms 6 "wind up" around the wheel in the opposite direction to the direction of rotation of the wheel. It can be seen that, in this embodiment, each tooth is formed by a portion 8 of the end of an arm which is bent in the direction of rotation of the wheel.
  • Figures 3 and 4 also shows that the central opening 4 comprises an arrangement 5 to have a certain elasticity.
  • This arrangement is particularly advantageous when the material used to make such an escapement is a material having a certain flexibility but being brittle such as glass, quartz or silicon.
  • the arms 6 comprise spikes 7. These spikes serve to angularly position the spur gear 11 relative to the escape wheel 1 during the assembly of the escapement mechanism. Once wheel and pinion correctly oriented relative to each other, these two parts are secured to one another by gluing or by any other suitable method. It will be observed that the escape pinion 11 could also have the characteristics of one of the configurations just described for the escape wheel 1.
  • Such a mobile according to the invention can be realized according to the techniques known in the field. If the material used is a metal or an alloy, the mobile can be cut into a plate by stamping, wire EDM, etc ... or be conformed by the LIGA technique. If the material used is a fragile material, such as glass, quartz and silicon, the mobile can be shaped by chemical etching.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Gears, Cams (AREA)
  • Micromachines (AREA)
  • Vibration Dampers (AREA)
EP20070110433 2006-06-23 2007-06-18 Mikromechanischer Drehteil mit stößgeregelter Rotation Active EP1870784B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20070110433 EP1870784B1 (de) 2006-06-23 2007-06-18 Mikromechanischer Drehteil mit stößgeregelter Rotation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP06012946 2006-06-23
EP20070110433 EP1870784B1 (de) 2006-06-23 2007-06-18 Mikromechanischer Drehteil mit stößgeregelter Rotation

Publications (3)

Publication Number Publication Date
EP1870784A2 true EP1870784A2 (de) 2007-12-26
EP1870784A3 EP1870784A3 (de) 2008-06-04
EP1870784B1 EP1870784B1 (de) 2009-08-19

Family

ID=38719873

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20070110433 Active EP1870784B1 (de) 2006-06-23 2007-06-18 Mikromechanischer Drehteil mit stößgeregelter Rotation

Country Status (1)

Country Link
EP (1) EP1870784B1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008058013A (ja) * 2006-08-29 2008-03-13 Seiko Instruments Inc 機械式時計の脱進機
WO2012010408A1 (fr) 2010-07-19 2012-01-26 Nivarox-Far S.A. Mecanisme oscillant a pivot elastique et mobile de transmission d'energie
EP2413202A1 (de) 2010-07-30 2012-02-01 ETA SA Manufacture Horlogère Suisse Verfahren zur Verbesserung der Verschleiss- und Stossfestigkeit einer Uhrwerkskomponente. Verschleiß- und stoßfester Anker für Uhrwerk
EP2455821A1 (de) 2010-11-18 2012-05-23 Nivarox-FAR S.A. Energieübertragungrad
CN113406875A (zh) * 2020-03-16 2021-09-17 精工时计株式会社 钟表零件、机芯和钟表

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH6659A (fr) * 1893-06-05 1893-12-30 Achille Lambert Roue pour montres
US2717488A (en) * 1952-01-07 1955-09-13 Gen Horlogere Noiseless anchor-escapement, particularly for clock-works
EP1445670A1 (de) * 2003-02-06 2004-08-11 ETA SA Manufacture Horlogère Suisse Spiralfeder der Resonatorunruh und Fabrikationsmethode

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH6659A (fr) * 1893-06-05 1893-12-30 Achille Lambert Roue pour montres
US2717488A (en) * 1952-01-07 1955-09-13 Gen Horlogere Noiseless anchor-escapement, particularly for clock-works
EP1445670A1 (de) * 2003-02-06 2004-08-11 ETA SA Manufacture Horlogère Suisse Spiralfeder der Resonatorunruh und Fabrikationsmethode

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008058013A (ja) * 2006-08-29 2008-03-13 Seiko Instruments Inc 機械式時計の脱進機
WO2012010408A1 (fr) 2010-07-19 2012-01-26 Nivarox-Far S.A. Mecanisme oscillant a pivot elastique et mobile de transmission d'energie
EP2894520A2 (de) 2010-07-19 2015-07-15 Nivarox-FAR S.A. Schwingungsmechanismus mit elastischem und beweglichen Zapfen zur Energieübertragung
EP2413202A1 (de) 2010-07-30 2012-02-01 ETA SA Manufacture Horlogère Suisse Verfahren zur Verbesserung der Verschleiss- und Stossfestigkeit einer Uhrwerkskomponente. Verschleiß- und stoßfester Anker für Uhrwerk
US8540418B2 (en) 2010-07-30 2013-09-24 Eta Sa Manufacture Horlogere Suisse Wear and shock resistant escapement lever for a timepiece movement
EP2455821A1 (de) 2010-11-18 2012-05-23 Nivarox-FAR S.A. Energieübertragungrad
CN113406875A (zh) * 2020-03-16 2021-09-17 精工时计株式会社 钟表零件、机芯和钟表

Also Published As

Publication number Publication date
EP1870784B1 (de) 2009-08-19
EP1870784A3 (de) 2008-06-04

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