EP3982206A1 - Uhr-oszillator - Google Patents

Uhr-oszillator Download PDF

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Publication number
EP3982206A1
EP3982206A1 EP20200595.5A EP20200595A EP3982206A1 EP 3982206 A1 EP3982206 A1 EP 3982206A1 EP 20200595 A EP20200595 A EP 20200595A EP 3982206 A1 EP3982206 A1 EP 3982206A1
Authority
EP
European Patent Office
Prior art keywords
escapement
balance
fork
pin
rocker
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.)
Pending
Application number
EP20200595.5A
Other languages
English (en)
French (fr)
Inventor
Xuan Mai Tu
James Hide
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.)
Patek Philippe SA Geneve
Original Assignee
Patek Philippe SA Geneve
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 Patek Philippe SA Geneve filed Critical Patek Philippe SA Geneve
Priority to EP20200595.5A priority Critical patent/EP3982206A1/de
Publication of EP3982206A1 publication Critical patent/EP3982206A1/de
Pending 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
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/04—Oscillators acting by spring tension
    • G04B17/06—Oscillators with hairsprings, e.g. balance
    • G04B17/063—Balance construction
    • 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
    • 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
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/32—Component parts or constructional details, e.g. collet, stud, virole or piton
    • 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
    • G04B33/00—Calibers

Definitions

  • the present invention relates to a horological oscillator, typically an oscillator of a horological movement, comprising a balance mounted on a balance shaft, a balance plate mounted on the balance shaft and carrying a pin, and an escapement rocker comprising a body mounted on an escapement rocker shaft and a fork at one end of the body.
  • the body extends over a first level and the fork extends over a second level.
  • the fork is arranged to cooperate with the pin in order to maintain the oscillations of the balance.
  • the peg protrudes from the balance plate parallel to the balance shaft.
  • a semi-direct impulse escapement is an escapement whose escape wheel communicates to the balance plate a direct impulse and an indirect impulse, via an escapement rocker, at each period of oscillation, the direct impulse being communicated during one of the two alternations of the balance and the indirect impulse during the other alternation.
  • the fork of the escapement rocker is on a different level from that of the body of the escapement rocker so as not to collide with the escapement wheel or with a tooth of the balance plate which cooperates with the exhaust during the direct impulse. This construction of the escapement rocker in two levels increases the overall height of the oscillator.
  • the present invention aims to remedy the aforementioned drawbacks of the state of the art and to this end proposes a timepiece oscillator according to claim 1, particular embodiments being defined in the dependent claims.
  • the present invention further proposes a timepiece, for example a watch, comprising such an oscillator.
  • a horological oscillator for a horological movement, in particular a watch movement, comprises a resonator 1 and an escapement 10 arranged to sustain the oscillations of the resonator 1.
  • the resonator 1 comprises a balance 2 mounted on a balance shaft 3 and a spring 4, typically a hairspring, arranged to return the balance 2 to an equilibrium position.
  • the escapement 10 comprises an escape wheel 12, an escapement rocker 14 and a balance plate 16.
  • the escape wheel 12 is mounted on an escape wheel axle 13 and is coaxially secured to a pinion 18 which meshes with the second wheel 19 of a going train. The latter tends to rotate the escape wheel 12 in a single direction, which is counterclockwise on the figures 2 to 12 .
  • the escape wheel 12 comprises on its periphery, on the same level and alternately, short teeth 36 and long teeth 38.
  • short teeth 36 and long teeth 38 are meant that the distance between the top of the tooth and the escape wheel axis 13 is smaller for the short teeth 36 than for the long teeth 38.
  • the short teeth 36 are identical and regularly distributed.
  • the long teeth 38 are also identical and regularly distributed. However, each short tooth 36 may be closer to one of the two adjacent long teeth 38 between which it is situated than to the other, as can be seen in the drawings.
  • the escapement rocker 14 is mounted on an escapement rocker shaft 15 and comprises a body 14a through which the shaft 15 passes.
  • the first arm 22 of the escapement rocker 14 defines a first resting surface 30 of concave shape.
  • the second arm 24 of the escapement rocker 14 defines a second resting surface 32 of concave shape.
  • These concave surfaces 30, 32 can be curved surfaces or consist of two inclined planes.
  • a side impulse surface 34 adjoins the second resting surface 32 on the second arm 24.
  • the balance plate 16 is mounted on the balance shaft 3 to rotate coaxially and integrally with the balance 2.
  • the balance plate 16 carries a plate pin 26, an impulse tooth 28 and a self-starting tooth 46.
  • the escape wheel 12, the escapement rocker 14 and the balance plate 16 can be held on their respective axes 13, 15, 3 elastically, as shown, or in another way, for example by gluing or brazing.
  • the axes 13, 15 of the escapement wheel 12 and of the escapement rocker 14 as well as the axis of the seconds wheel 19 each have one end which pivots in a plate 5 which can be the plate of the watch movement and another end which pivots in an escapement bridge 29.
  • the balance shaft 3 pivots at one end in the plate 5 and at its other end in a balance bridge 6.
  • the escapement 10 is of the type with one pulse per alternation, more precisely of the semi-direct pulse type.
  • Each alternation (half-period of oscillation) of the balance 2 comprises a rest phase, a release phase and an impulse phase.
  • the figures 3 to 12 show successive states of the escapement 10 during the oscillation period.
  • a short tooth 36a bears against the first resting surface 30 of the escapement rocker 14.
  • the concave shape of the first resting surface 30 allows the escapement wheel 12 and the escapement rocker 14 to lock each other.
  • the escapement wheel 12 and the escapement rocker 14 are in an entry rest position.
  • the balance plate 16 rotates freely in a first direction S1, namely clockwise on the picture 3 , under the action of the return spring 4 of the balance 2.
  • pin 26 of balance plate 16 engages in fork 20 and comes into contact with inner surface 40a of one 40 of the latter's horns to rotate the escapement rocker 14 and release escapement wheel 12 from first resting surface 30 ( figure 4 ).
  • the escape wheel 12 is partially released, its rotation being braked by a transition surface 44 of the first arm 22 on which the short tooth 36a must slide.
  • the angle ⁇ between the entry and exit rest positions of the escapement wheel 12 is smaller than the angle ⁇ between the entry rest position of the escapement wheel 12 and the axis imaginary axis of rotation of the escapement rocker 14, these angles being seen from the imaginary axis of rotation of the escapement wheel 12.
  • the self-starting tooth 46 carried by the balance plate 16 facilitates the restarting of the escapement 10 when the disarming of the driving member (typically a barrel spring) of the watch movement causes the torque on the escapement 12 is no longer sufficient to overcome the resistance of the return spring 4 of the balance 2 during the impulse, causing the stoppage of the escapement 10. It is possible to adjust the neutral angular position of the balance 2, this that is to say the angular position at which the torque of the return spring 4 of the balance wheel 2 is zero, so that the escapement 10 always stops in a position where a long tooth 38 of the escapement wheel 12 is located between the impulse tooth 28 and the self-starting tooth 46 of the balance plate 16.
  • the balance plate 16 is in two levels, as shown in the figure 14 .
  • On a first level it comprises a circular body 48 and, on the periphery thereof, the impulse and self-starting teeth 28, 46 and a radial protuberance 50.
  • a second level comprises the pin 26 projecting from the end of the radial protrusion 50 in the axial direction of the balance plate 16, a truncated circular body 52 aligned with the circular body 48 and, between the pin 26 and the truncated circular body 52, a clearance 54.
  • the balance plate 16 can be obtained, for example, by multi-level deep reactive ion etching (DRIE) of a silicon substrate, by etching on both sides of a silicon-on-insulator (known as SOI) substrate or by mono -level of two separate silicon substrates then assembly of the two substrates etched by fusion (“fusion bonding”) or another appropriate technique. Materials other than silicon can of course be used.
  • the impulse and self-starting teeth 28, 46 could be in the form of pallets embedded in the circular body 48.
  • the clearance 54 allows the horns 40, 42 of the fork 20 to pass behind the peg 26 during the clearance phases and the indirect impulse phase (cf. figure 4 , 10 and 12 ). This gives more freedom in the design of the exhaust.
  • the circular part of the periphery of the truncated circular body 52 serves as a stop on the reverse of the horns 40, 42 in the event of an impact to prevent the overturning of the escapement rocker 14 from one of its rest positions to the other when the pin 26 is outside the fork 20.
  • the truncated circular body 52 and the reverse of the lugs 40, 42 advantageously replace the small notched plate and the stinger of traditional escapements and reduces the number of levels (from three to two) of the plate of balance wheel and therefore the height of the escapement.
  • the escapement rocker 14 is also in two levels, with a first level comprising the body 14a and the arms 22, 24 and a second level comprising the fork 20.
  • the fork 20, thus raised with respect to the body 14a, can cooperate with the second level 26, 52 of the balance plate 16 without risk of colliding with the escapement wheel 12 or with the impulse and self-starting teeth 28, 46.
  • the balance plate 16 is returned relative to the conventional position of a balance plate.
  • its second level 26, 52 is on the side of the balance 2 while the first level 48, 46, 28, 50 is on the side of the plate 5.
  • the pin 26 is therefore directed towards the balance 2, this which allows the fork 20 to be placed close to the balance wheel 2, in a space between the upper part, 29a, of the escapement bridge 29 and the balance wheel axis 3.
  • the escapement rocker 14 n does not increase the size of the oscillator in height despite its construction on two levels, and this without having to fix the pin 26 directly on the balance 2.
  • the present invention is also applicable to the escapement described in the patent EP 2941673 B1 , other semi-direct impulse escapements, as well as other types of escapements such as the Swiss lever escapement.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Micromachines (AREA)
EP20200595.5A 2020-10-07 2020-10-07 Uhr-oszillator Pending EP3982206A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20200595.5A EP3982206A1 (de) 2020-10-07 2020-10-07 Uhr-oszillator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20200595.5A EP3982206A1 (de) 2020-10-07 2020-10-07 Uhr-oszillator

Publications (1)

Publication Number Publication Date
EP3982206A1 true EP3982206A1 (de) 2022-04-13

Family

ID=72801406

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20200595.5A Pending EP3982206A1 (de) 2020-10-07 2020-10-07 Uhr-oszillator

Country Status (1)

Country Link
EP (1) EP3982206A1 (de)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1359005A (en) * 1920-07-26 1920-11-16 Verner Clarence Triple roller for watches
CH314705A (fr) * 1954-04-08 1956-06-30 Baumgartner Freres Sa Montre Roskopf à seconde directe excentrée
EP3029530A1 (de) * 2014-12-03 2016-06-08 Nivarox-FAR S.A. Wirbelmechanismus
EP2941673B1 (de) 2013-04-03 2016-08-17 Detra SA Hemmungsvorrichtung für ein uhrwerk
CH713244A2 (fr) * 2016-12-12 2018-06-15 Richemont Int Sa Mécanisme d'échappement.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1359005A (en) * 1920-07-26 1920-11-16 Verner Clarence Triple roller for watches
CH314705A (fr) * 1954-04-08 1956-06-30 Baumgartner Freres Sa Montre Roskopf à seconde directe excentrée
EP2941673B1 (de) 2013-04-03 2016-08-17 Detra SA Hemmungsvorrichtung für ein uhrwerk
EP3029530A1 (de) * 2014-12-03 2016-06-08 Nivarox-FAR S.A. Wirbelmechanismus
CH713244A2 (fr) * 2016-12-12 2018-06-15 Richemont Int Sa Mécanisme d'échappement.

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