EP4130890A1 - Uhrwerk mit oszillator, der eine piezoelektrische spiralfeder enthält - Google Patents

Uhrwerk mit oszillator, der eine piezoelektrische spiralfeder enthält Download PDF

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Publication number
EP4130890A1
EP4130890A1 EP21189581.8A EP21189581A EP4130890A1 EP 4130890 A1 EP4130890 A1 EP 4130890A1 EP 21189581 A EP21189581 A EP 21189581A EP 4130890 A1 EP4130890 A1 EP 4130890A1
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EP
European Patent Office
Prior art keywords
oscillator
watch
amplitude
piezoelectric
movement
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
EP21189581.8A
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English (en)
French (fr)
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EP4130890B1 (de
Inventor
Matthias Imboden
Alexandre DIDIER
Alexandre Haemmerli
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Swatch Group Research and Development SA
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Swatch Group Research and Development 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 Swatch Group Research and Development SA filed Critical Swatch Group Research and Development SA
Priority to EP21189581.8A priority Critical patent/EP4130890B1/de
Priority to US17/804,667 priority patent/US20230044830A1/en
Priority to JP2022101597A priority patent/JP7402927B2/ja
Priority to CN202210903356.0A priority patent/CN115705007A/zh
Publication of EP4130890A1 publication Critical patent/EP4130890A1/de
Application granted granted Critical
Publication of EP4130890B1 publication Critical patent/EP4130890B1/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
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/04—Oscillators acting by spring tension
    • G04B17/06—Oscillators with hairsprings, e.g. balance
    • G04B17/066—Manufacture of the spiral spring
    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F5/00—Apparatus for producing preselected time intervals for use as timing standards
    • G04F5/04—Apparatus for producing preselected time intervals for use as timing standards using oscillators with electromechanical resonators producing electric oscillations or timing pulses
    • G04F5/06—Apparatus for producing preselected time intervals for use as timing standards using oscillators with electromechanical resonators producing electric oscillations or timing pulses using piezoelectric resonators
    • G04F5/063—Constructional details
    • 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
    • G04B17/20—Compensation of mechanisms for stabilising frequency
    • 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
    • G04B17/20—Compensation of mechanisms for stabilising frequency
    • G04B17/26—Compensation of mechanisms for stabilising frequency for the effect of variations of the impulses
    • 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
    • G04B17/20—Compensation of mechanisms for stabilising frequency
    • G04B17/28—Compensation of mechanisms for stabilising frequency for the effect of imbalance of the weights, e.g. tourbillon
    • 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
    • G04C3/04—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a balance
    • G04C3/047—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a balance using other coupling means, e.g. electrostrictive, magnetostrictive
    • 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
    • G04C3/08—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically
    • G04C3/12—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically driven by piezoelectric means; driven by magneto-strictive means

Definitions

  • the present invention relates to a watch movement comprising a barrel and an analog time display, which is driven by the barrel via a gear train, as well as a balance-spring to control the rate of the watch movement.
  • the hairspring is of the piezoelectric type with electrodes arranged on the two lateral surfaces.
  • the invention also relates to a watch incorporating such a horological movement and a source of electrical energy.
  • Patent applications EP 3 540 528 And EP 3 629 103 respectively describe a process for regulating the average frequency of a balance-spring and a process for synchronizing the frequency of a balance-spring using a piezoelectric hairspring connected to an electronic control unit provided with a quartz oscillator.
  • the object of the present invention is to modify a watch movement of the mechanical type by incorporating an electronic system making it possible to increase its rate precision, without however renouncing a balance-spring to clock the rate of the watch movement, in particular driving its analog display device. Moreover, the present invention proposes to modify the watch movement so that it remains functional even when the electronic system is inactive, in particular due to a lack of electrical energy available.
  • the subject of the invention is a watch movement comprising an analog time display, a gear train, a barrel in kinematic relationship with the analog display via the gear train, and an oscillator formed of a resonator, comprising a balance wheel and a hairspring piezoelectric, and a mechanical escapement coupling the balance wheel to the gear train, the piezoelectric hairspring being formed at least partially of a piezoelectric material and comprising at least two electrodes, at least one electrode of which is connected to an electronic control circuit, the piezoelectric material and said at least one electrode being arranged so as to allow the application, managed by the electronic control circuit, of an electrical stress on the piezoelectric hairspring.
  • the watch movement is configured so that the barrel is capable of driving the analog display and of maintaining on its own a functional oscillation of the oscillator with a first amplitude which is in particular a function of the spatial orientation of the watch movement.
  • the electronic control circuit is arranged to be able to be connected to a source of electrical energy and to be able to control the application of an electrical voltage to said at least one electrode so as to generate driving electrical pulses for the oscillator which provide it with sufficient energy to allow functional oscillation of this oscillator, for each spatial orientation of the watch movement, with a second amplitude which is greater than a maximum nominal value of the first amplitude for this spatial orientation.
  • the electronic control circuit is arranged to control said application of an electric voltage so as to maintain the second amplitude substantially constant for any spatial orientation of the watch movement and any barrel winding level.
  • the electronic control circuit comprises a circuit for detecting the amplitude of a voltage induced in the piezoelectric hairspring and a feedback loop for maintaining this amplitude at a given set value, thus allowing to regulate the amplitude of the oscillation of the resonator.
  • said maximum nominal value is less than or equal to 300° for any spatial orientation of the watch movement and said second amplitude is greater than 300° for any spatial orientation of the watch movement and any winding level of the barrel.
  • the invention also relates to a watch in which is incorporated an energy source which is formed by an electricity generator arranged to be able to collect external energy and transform it into electrical energy, so as to allow a power supply to the electronic control circuit and the piezoelectric hairspring.
  • the precision of the watch incorporating the movement according to the invention can be increased, in particular thanks to a large amplitude for the oscillation of the balance which can be maintained by the driving electrical impulses supplied to the electromechanical oscillator via the piezoelectric hairspring.
  • the preferred embodiment firstly makes it possible to compensate for a reduction in the force torque provided by the barrel, so as to maintain the oscillation maintenance power substantially constant for each spatial orientation of the horological movement, respectively of the watch which incorporates it.
  • the frequency variation of the oscillator generally occurring in a conventional mechanical movement due to the variation of the force torque provided by the barrel over time is eliminated in this preferred embodiment.
  • this preferred embodiment makes it possible to eliminate a difference in amplitude for different spatial positions of the timepiece movement, respectively of the watch which incorporates it.
  • the mode preferred embodiment makes it possible to avoid variations in the rate of the watch movement which may occur for other reasons in conventional mechanical movements, namely the aging of the oils, hard points in the gear train or a momentarily increased demand for torque, such as when passing from one date to the next, etc.
  • the present invention makes it possible to effectively solve the various problems that can occur in mechanical watch movements and lead to a loss of isochronism, which results in a temporal drift in the display of the current time.
  • the watch movement 2 comprises an analog time display 4, a gear train 6, a barrel 8 driving the analog display via the gear train, and an electromechanical oscillator 10 formed of a resonator 12, comprising a balance wheel 14 and a piezoelectric hairspring 16, and a mechanical escapement 18 coupling the balance wheel to the gear train.
  • the watch movement is equipped with an oscillating weight 24 (not shown in Figures 1 And 2 , but to Figure 5 And 6 ) used to wind the barrel.
  • the balance wheel is pivoted in a balance bridge 26, this bridge carrying a gear 28 serving to adjust the oscillation frequency of the resonator 12, as is customary in mechanical watch movements.
  • the piezoelectric hairspring is formed at least partially of a piezoelectric material and comprises at least two electrodes, at least one of which is connected to an electronic control circuit 20.
  • the resonator 12 and the electronic control circuit 20 to which two external electrodes 68 and 69 of the piezoelectric hairspring 16 are connected by two electrical connections 21A and 21B.
  • a cross section of the piezoelectric hairspring 16 is shown in Figure 4 in no way limiting.
  • This hairspring comprises a central body 60 in silicon, a layer of silicon oxide 62 deposited on the surface of the central body so as to thermally compensate the hairspring, a first conductive layer 64 deposited on the layer of silicon oxide, and a piezoelectric material deposited in the form of a piezoelectric layer 66 on the first conductive layer 64.
  • the piezoelectric layer consists of an aluminum nitride crystal formed by a growth of this crystal from the first conductive layer and perpendicular to the latter.
  • Two external electrodes 68 and 69, formed by a second partial conductive layer on the piezoelectric layer, are arranged respectively on the two lateral sides of the hairspring and are connected to two respective terminals 70 and 71 of the electronic control circuit 20.
  • the piezoelectric layer 66 comprises a first part 74A and a second part 74B which extend respectively on the two lateral sides of the central body 60 and which present, by their growth from the first conductive layer 64, respective crystallographic structures which are symmetrical relative to a median plane 76 parallel to these two lateral sides.
  • the piezoelectric layer 66 has two respective piezoelectric axes 78A and 78B perpendicular to this piezoelectric layer and in opposite directions.
  • the internal electrode formed of the first conductive layer 64, does not need its own electrical connection with the electronic control circuit 20 or with the ground of the watch movement, although this is not excluded.
  • the piezoelectric material 66 and the two electrodes 68 and 69 are arranged so as to allow the application, controlled by the electronic control circuit 20, of an electric stress on the piezoelectric hairspring so as to supplying the resonator 12 with driving pulses which participate at least in part in maintaining a functional oscillation of this resonator, preferably with a substantially constant amplitude.
  • the electronic control circuit 20 is arranged to be able to be connected to a source of electrical energy 30 and to be able to control the application of an electrical voltage between the external electrodes 68 and 69, so as to generate driving pulses for the resonator 12.
  • the electronic control circuit is arranged to be able to manage the application of an electric voltage to at least one of the two external electrodes 68 and 69, so as to generate pulses motors for the electromechanical oscillator 10 via the piezoelectric hairspring constrained by the applied electrical voltage, so as to supply electrical energy to this oscillator which is sufficient for the resonator 12 to be able to have a functional oscillation with an amplitude greater than a maximum nominal value for the amplitude of an oscillation function of this resonator, for each spatial orientation of the watch movement, in the absence of driving impulses of electrical origin.
  • driving electrical pulses to the electromechanical oscillator 10, that is to say energy pulses, which make it possible either to maintain a functional oscillation of the resonator 12, or to participate in the maintenance of such a functional oscillation.
  • the frequency of these driving impulses depends in particular on their duration and their electrical voltage.
  • driving pulses can be dimensioned so that they occur once during each halfwave or once per period of oscillation of the resonator.
  • the watch 22 comprises a source of electrical energy 30 which is formed by an electricity generator arranged to produce electricity in such a way as to enable the electronic control circuit 20 and the piezoelectric hairspring to be powered.
  • the electricity generator is connected to a storage unit, in particular a rechargeable battery or a supercapacitor, via a circuit for managing the electric power supplied to the electronic control circuit 20 and to the electromechanical oscillator 10.
  • the voltage necessary to power the piezoelectric hairspring is located in a voltage range between 10 V and 40 V.
  • the electrical power management circuit is arranged to be able to increase the voltage accumulated in the storage unit or supplied directly by the electricity generator.
  • it comprises a voltage booster, for example a charge pump.
  • thermopile which receives thermal energy from the user's arm as energy external to the watch.
  • the thermopile is thus arranged so as to be able to convert heat from the body of a user into electricity.
  • the watch When the watch is not worn and the power supply is not active, this watch can be left in a stable position so that the oscillation amplitude and thus the frequency of the electromechanical oscillator are no longer disturbed by variations in the orientation of the watch.
  • the electrical power supply is active and the electrical control circuit is operational when the watch is worn, namely when the amplitude and thus the frequency of a conventional mechanical movement vary according to the spatial orientation of the watch. .
  • the present invention generally makes it possible to improve the rate of the watch and, in a preferred embodiment which will be described in more detail later, to maintain constant the amplitude of oscillation of the electromechanical oscillator to any spatial orientation and any winding level of the barrel which is sufficient to drive the analog display device.
  • the watch according to the invention does not does not include an electric generator which makes it autonomous, but it then includes a battery in the form of a cell.
  • the electrical energy source 30 does not have sufficient electrical energy stored or does not receive sufficient electrical energy from the electricity generator to correctly power the piezoelectric hairspring, so that the electronic control circuit 20 does not generate driving electrical pulses.
  • the watch movement 2 therefore behaves like a conventional mechanical movement.
  • the escapement 18 is a usual escapement which is not only counter but also arranged to allow the barrel, via a gear train, to supply mechanical maintenance pulses to the resonator 12 to obtain a functional oscillation of the latter.
  • the watch movement is therefore configured so that the barrel is capable of driving the analog display 4 of the watch 22 and of maintaining on its own a functional oscillation of the oscillator with a first amplitude which is in particular a function of the spatial orientation of the watch movement.
  • the oscillation frequency of the resonator will therefore vary as a function of the spatial orientation of the watch movement and in general also of the winding level of the barrel. It is known that when the torque supplied by the barrel decreases, the amplitude of the oscillation of the resonator also decreases and this significantly in the last third of the power reserve. A decrease in amplitude generally causes a decrease in the frequency of oscillation and the precision of the rate is therefore affected. In addition, the amplitude varies according to the orientation of the watch movement (more particularly of the resonator), so that this first state is therefore not ideal but useful in the context of the present invention which has in particular aims to keep the watch movement functional in the absence of sufficient electrical power. This first state is in particular provided for a situation where the watch concerned is not worn and advantageously left in a given favorable position. This limits the variation in frequency of the resonator since no variation in amplitude due to changes in orientation of this resonator occurs.
  • the electrical energy source 30 of the watch comprises sufficient stored electrical energy or it receives sufficient electrical energy from the electricity generator to correctly supply the piezoelectric hairspring, so that the electronic control circuit 20 then generates driving electrical pulses.
  • the electronic control circuit manages the application of an electric voltage to at least one electrode of the two electrodes 68, 69 of the piezoelectric hairspring by applying an electric voltage to at least one of the corresponding terminals 70, 71 (see Figure 4 And 7 ), so as to generate driving pulses for the oscillator 10 which provide it with sufficient energy to allow functional oscillation of the oscillator, for each spatial orientation of the watch movement, with a second amplitude which is greater than a maximum nominal value of the first amplitude, mentioned above and occurring in the first principal state, for this spatial orientation.
  • the maximum nominal value of the first amplitude is less than or equal to 300° for any spatial orientation of the watch movement, in particular of its resonator 12, and the second amplitude is greater than 300° for any spatial orientation of the watch movement and any winding level of the barrel.
  • the maximum nominal value of the first amplitude is between 240° and 300° for any spatial orientation of the watch movement, in particular of its resonator 12, and the second amplitude is provided between 305° and 330° for any spatial orientation of the watch movement and any winding level of the barrel.
  • the invention makes it possible to provide a gear ratio between the barrel and the escape wheel which can be greater than that of conventional mechanical movements. , and therefore to increase the power reserve, while ensuring a functional oscillation of the oscillator 10 at least during stable conditions, in particular in the absence of accelerations such as when the watch is not worn, preferably for any spatial orientation of this watch and therefore of the watch movement, but at least for a given orientation.
  • two operating variants can occur in the second main state of the watch 22 described above.
  • the first variant in particular because of the inertia of the gear train (including the escapement wheel), the maintenance of the resonator 12 and also the reciprocating movement of the lever of the mechanical escapement are substantially or totally ensured by the electrical supply of the piezoelectric hairspring, in particular by driving electrical pulses.
  • the driving speed of the anchor by the balance wheel of the resonator 12 is too high for the escapement wheel to be able, during each step of this wheel escapement after the release of the anchor, provide a significant force torque to this anchor.
  • the maintenance of the resonator and the reciprocating movement of the anchor are ensured jointly by the barrel 8 and the source of electrical energy 30. It is possible to envisage that a watch according to the invention has only the either of these two variants in its operation when the second main state is activated. However, in another watch according to the invention, the first operating variant and the second operating variant occur at different times, in particular depending on the winding level of the barrel and possibly on the spatial orientation of this other watch, in particular of its resonator.
  • the electronic control circuit 20 is arranged to be able to control the application of an electric voltage to the piezoelectric hairspring so as to maintain, in the second main state of the operation of the watch movement, the amplitude of the oscillation of the resonator 12/oscillator 14 substantially constant, in particular for any spatial orientation of the watch movement and any winding level of the barrel.
  • the electronic control circuit 20 comprises a peak voltage detector 46, which is arranged to be able to substantially detect the amplitude of the voltage induced in the piezoelectric hairspring 16 when the resonator 12 oscillates, and a circuit regulator 20A which receives from the peak voltage detector a signal S A relating to the amplitude of the induced voltage and which is arranged to manage a supply voltage V A , supplied to the piezoelectric hairspring through a locking loop phase 20B, as a function of a set value Sc for the signal S A supplied by the peak voltage detector, so as to obtain an oscillation of the resonator with a substantially constant amplitude.
  • a peak voltage detector 46 which is arranged to be able to substantially detect the amplitude of the voltage induced in the piezoelectric hairspring 16 when the resonator 12 oscillates
  • a circuit regulator 20A which receives from the peak voltage detector a signal S A relating to the amplitude of the induced voltage and which is arranged to manage a supply voltage V
  • the setpoint value Sc corresponds to a setpoint amplitude provided for the oscillation of the resonator 12.
  • the regulation circuit 20A comprises processing parts P, I, D arranged in parallel and well known to those skilled in the art, which process a difference between the setpoint value Sc and the value of the signal d amplitude S A by a proportional response, respectively as a function of an integration and a derivation of this difference over time.
  • the regulation circuit also receives a reference voltage V R which is adjusted according to the regulation carried out by the circuit 20A.
  • a buffer element 44 high input impedance transistor
  • the phase-locked loop 20B slaves the phase of the periodic power supply signal to the phase of the induced voltage signal, supplied in particular to terminal 71, so that the power supply voltage constrains the piezoelectric spiral in the direction of its movement, which is either in contraction or in extension according to the alternation in progress.
  • circuit 20B detects zero crossings of the induced voltage, in particular at terminal 71.
  • the polarity of the supply voltage is selected so as to constrain the piezoelectric hairspring in the direction of its movement, which is alternately in extension and in contraction during the alternations of the oscillation of the resonator.
  • a quartz oscillator is associated with the electronic control circuit 20.
  • This quartz oscillator can be used for various needs.
  • the management of the supply voltage V A can comprise a modulation of the driving pulses with a variable duty cycle depending on the amplitude signal S A and the setpoint value Sc, in particular their difference.
  • the electrical pulses motors are triggered with a reference frequency Fc for the oscillator 10 / the resonator 12 which is determined very precisely by the quartz oscillator.
  • the frequency Fs of the power supply signal is not too far from the resonant frequency of the resonator, namely from its natural frequency F N , such a power supply to the piezoelectric hairspring can impose the setpoint frequency on the maintained resonator 12, by partly or totally, by the driving electrical pulses, so that the electromechanical oscillator 10 will be able to oscillate at the setpoint frequency, with the precision of quartz, and an amplitude greater than that corresponding in the first main operating state, and in particular greater than a given limit value, whatever the spatial orientation of the watch movement.
  • the quartz oscillator more generally the electronic oscillator is in this system a master oscillator and the electromechanical oscillator is a slave oscillator.
  • the electromechanical oscillator is slaved to the electronic oscillator indirectly, through the generation of driving electrical pulses supplied to the electromechanical oscillator, the triggering of which is controlled/determined by the electronic oscillator.
  • This number N must be provided sufficiently small, depending in particular on the range of possible values for the natural frequency F N of the electromechanical oscillator and also on the quantity of electrical energy to be supplied to this electromechanical oscillator in order to have an amplitude of oscillation increased and advantageously maintained above a predetermined limit value.
  • the advantageous variant described above can be easily implemented to obtain a gain in precision for the operation of the watch movement in the second main operating state, and therefore of the shows which incorporates it, with almost no increase in electricity consumption linked to the maintenance, partial or total, of a relatively large amplitude oscillation.
  • the power supply circuit does not need to comprise a phase-locked loop for controlling the driving pulses; which simplifies its design.
  • the electronic control circuit is therefore associated with a quartz oscillator and arranged so as to generate the driving electrical pulses with a specific supply frequency which is determined by the quartz oscillator and which is a function of a setpoint frequency for the electromechanical oscillator, which is configured so that its natural oscillation frequency remains within a range of values, for any spatial orientation of the watch movement and any winding level of the barrel, sufficiently close to the setpoint frequency to allow the driving electrical pulses to impose, at least after an initial period of operation and in the absence of excessive disturbances, the setpoint frequency Fc on the electromechanical oscillator 10, having an oscillation functional of this electromechanical oscillator at the second amplitude mentioned above, preferably constant.
  • N Tc / 2 with N greater than zero.
  • the number N which can be variable, is selected from a range of values making it possible to impose the setpoint frequency Fc on the electromechanical oscillator, this range of values being a function of the range of possible natural frequencies for this oscillator, which is maintained sufficiently close to the set frequency thanks to the aforementioned first regulation.
  • the second regulation by a signal of periodic power supply determined by the quartz oscillator, in particular by driving electrical pulses at the setpoint frequency Fc is guaranteed with a relatively large functional amplitude, provided that the number N is not too high.
  • the advantageous variant of the particular embodiment may, in another implementation, not be combined with the preferred embodiment of the electronic control circuit, so that the amplitude regulation is not provided and the frequency of the electromechanical oscillator is imposed, at least after an initial operating phase, by the generation of driving electrical pulses at a supply frequency Fs defined above.
  • the power supply circuit does not include a circuit for detecting passage through zero of the induced voltage.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Electric Clocks (AREA)
  • General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
  • Electromechanical Clocks (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
EP21189581.8A 2021-08-04 2021-08-04 Uhrwerk mit oszillator, der eine piezoelektrische spiralfeder enthält Active EP4130890B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP21189581.8A EP4130890B1 (de) 2021-08-04 2021-08-04 Uhrwerk mit oszillator, der eine piezoelektrische spiralfeder enthält
US17/804,667 US20230044830A1 (en) 2021-08-04 2022-05-31 Horological movement equipped with an oscillator comprising a piezoelectric balance-spring
JP2022101597A JP7402927B2 (ja) 2021-08-04 2022-06-24 圧電バランスばねを備える発振器を備える計時器用ムーブメント
CN202210903356.0A CN115705007A (zh) 2021-08-04 2022-07-27 配备有包括压电式游丝的振荡器的钟表机芯

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21189581.8A EP4130890B1 (de) 2021-08-04 2021-08-04 Uhrwerk mit oszillator, der eine piezoelektrische spiralfeder enthält

Publications (2)

Publication Number Publication Date
EP4130890A1 true EP4130890A1 (de) 2023-02-08
EP4130890B1 EP4130890B1 (de) 2024-03-27

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EP21189581.8A Active EP4130890B1 (de) 2021-08-04 2021-08-04 Uhrwerk mit oszillator, der eine piezoelektrische spiralfeder enthält

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US (1) US20230044830A1 (de)
EP (1) EP4130890B1 (de)
JP (1) JP7402927B2 (de)
CN (1) CN115705007A (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8721169B2 (en) * 2010-04-21 2014-05-13 Team Smartfish Gmbh Controller for a clockwork mechanism, and corresponding method
US9721169B2 (en) 2012-07-27 2017-08-01 Clarion Co., Ltd. Image processing device for detecting vehicle in consideration of sun position
EP3540528A1 (de) 2018-03-16 2019-09-18 The Swatch Group Research and Development Ltd Uhr, die ein mechanisches uhrwerk umfasst, dessen ganggenauigkeit durch eine elektronische vorrichtung reguliert wird
EP3629103A1 (de) 2018-09-28 2020-04-01 The Swatch Group Research and Development Ltd Uhr, die ein mechanisches uhrwerk umfasst, dessen ganggenauigkeit durch eine elektronische vorrichtung reguliert wird

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3767388B2 (ja) 2001-01-30 2006-04-19 セイコーエプソン株式会社 圧電調速機およびこの圧電調速機を用いた電子機器
EP4099100A1 (de) * 2021-06-02 2022-12-07 The Swatch Group Research and Development Ltd Uhrwerk, das mit einem oszillator ausgestattet ist, der eine piezoelektrische spirale enthält

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8721169B2 (en) * 2010-04-21 2014-05-13 Team Smartfish Gmbh Controller for a clockwork mechanism, and corresponding method
US9721169B2 (en) 2012-07-27 2017-08-01 Clarion Co., Ltd. Image processing device for detecting vehicle in consideration of sun position
EP3540528A1 (de) 2018-03-16 2019-09-18 The Swatch Group Research and Development Ltd Uhr, die ein mechanisches uhrwerk umfasst, dessen ganggenauigkeit durch eine elektronische vorrichtung reguliert wird
EP3629103A1 (de) 2018-09-28 2020-04-01 The Swatch Group Research and Development Ltd Uhr, die ein mechanisches uhrwerk umfasst, dessen ganggenauigkeit durch eine elektronische vorrichtung reguliert wird

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CN115705007A (zh) 2023-02-17
JP2023024286A (ja) 2023-02-16
JP7402927B2 (ja) 2023-12-21
EP4130890B1 (de) 2024-03-27
US20230044830A1 (en) 2023-02-09

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