公开(公告)号：US12276944B2

公开(公告)日：2025-04-15

申请号：US17804667

申请日：2022-05-31

Applicant: The Swatch Group Research and Development Ltd

Inventor： Matthias Imboden ,  Alexandre Didier ,  Alexandre Haemmerli

IPC: G04F5/06 ,  G04C3/04

Abstract: An horological movement includes an analogue time display, a geartrain, a barrel and an electromechanical oscillator, which is formed of a resonator, including a balance and a piezoelectric balance-spring, and a mechanical escapement, and further includes an electronic control circuit connected to an electrical energy source and arranged to be able to control the application of an electrical voltage on at least one electrode of the piezoelectric balance-spring so as to generate driving electrical pulses for the oscillator. The horological movement is configured such that the barrel is capable, in a first main state, of maintaining alone a functional oscillation of the oscillator with a first amplitude, while in a second main state, the electronic control circuit powers the piezoelectric balance-spring to maintain, partially or fully, the oscillation of the resonator with a second amplitude greater than the first amplitude for any spatial orientation, the second amplitude being preferably constant.

公开(公告)号：US20230198429A1

公开(公告)日：2023-06-22

申请号：US18074886

申请日：2022-12-05

Applicant: The Swatch Group Research and Development Ltd

Inventor： Jean-Jacques BORN ,  Yvan Ferri ,  Alexandre Didier ,  Lionel Paratte ,  Léonard Testori

IPC: H02N2/10 ,  H02N2/12 ,  G04C3/12

CPC classification number: H02N2/103 ,  H02N2/123 ,  G04C3/12

Abstract: A rotary piezoelectric motor (1), in particular for a timepiece, including a rotor (3) configured to rotate and actuate a mechanical device, and a stator (2) configured to rotate the rotor (3), the stator (2) including a piezoelectric actuator provided with a resonator (29) arranged to perform an oscillatory motion, and a fixed element (4). The resonator in a movable element (5) arranged at a distance from the fixed element (4) and connected to the fixed element (4), the piezoelectric actuator being configured to move the movable element (5) against the rotor (3) to make it rotate, the movement of the movable element (5) making the rotor (3) rotate in a first direction.

公开(公告)号：US12282298B2

公开(公告)日：2025-04-22

申请号：US17662691

申请日：2022-05-10

Applicant: The Swatch Group Research and Development Ltd

Inventor： Matthias Imboden ,  Alexandre Haemmerli ,  Alexandre Didier ,  Cédric Nicolas

IPC: G04C3/12 ,  G04F5/06 ,  H10N10/80

Abstract: A horological movement includes an analogue time display, a gear train, a barrel driving the analogue display via the gear train, and an oscillator formed of a resonator, including a balance and a piezoelectric spring, and a mechanical escapement coupling the balance to the gear train. This horological movement further includes an electric energy source which is associated with the electronic control circuit, which is arranged to be able to control the application of an electrical supply voltage to the piezoelectric spring to excite the oscillator to obtain a functional oscillation of the resonator and then to maintain this functional oscillation. The mechanical escapement is an escapement for counting the alternations of the functional oscillation, to pace the running of the horological movement, without the resonator being able to receive from the barrel via this mechanical escapement enough mechanical energy to maintain the functional oscillation.