In a quartz crystal unit, the unit comprising a quartz crystal resonator having a base portion, and first and second tuning fork arms connected to the base portion, the base portion having a length less than 0.5 mm and greater than a spaced-apart distance between the first and second tuning fork arms, each of the first and second tuning fork arms having a width less than 0.1 mm and a length less than 1.56 mm, and a plurality of different widths including a first width and a second width greater than the first width, at least one groove being formed in at least one of opposite main surfaces of each of the first and second tuning fork arms so that a length of the at least one groove is within a range of 0.3 mm to 0.79 mm, the quartz crystal resonator being housed in a case, and a lid being connected to the case.

In a quartz crystal unit, the unit comprising a quartz crystal resonator having a base portion, and first and second tuning fork arms connected to the base portion, the base portion having a length less than 0.5 mm and greater than a spaced-apart distance between the first and second tuning fork arms, each of the first and second tuning fork arms having a width less than 0.1 mm and a length less than 1.56 mm, and a plurality of different widths including a first width and a second width greater than the first width, at least one groove being formed in at least one of opposite main surfaces of each of the first and second tuning fork arms so that a length of the at least one groove is within a range of 0.3 mm to 0.79 mm, the quartz crystal resonator being housed in a case, and a lid being connected to the case.

Watch comprising a movement, with a timepiece balance wheel comprising a ring distinct from the balance rim, carried by a flange with respect to which this ring is movable in rotation to modify the position of inertia blocks elastically carried by the flange, each able to be indexed in different stable angular positions corresponding to a different inertia of the timepiece balance wheel, the movement further including an operating member movable between coupled and uncoupled positions which includes a stop means for immobilizing the rim in a coupled position, and a control means for rotating the ring to modify the position of the inertia blocks in the coupled position, the watch including a crown controlling the control means, a rotating coupling ring controlling the coupling/uncoupling of the operating member through contactless interaction with an external adjustment tool.

Watch comprising a movement, with a timepiece balance wheel comprising a ring distinct from the balance rim, carried by a flange with respect to which this ring is movable in rotation to modify the position of inertia blocks elastically carried by the flange, each able to be indexed in different stable angular positions corresponding to a different inertia of the timepiece balance wheel, the movement further including an operating member movable between coupled and uncoupled positions which includes a stop means for immobilizing the rim in a coupled position, and a control means for rotating the ring to modify the position of the inertia blocks in the coupled position, the watch including a crown controlling the control means, a rotating coupling ring controlling the coupling/uncoupling of the operating member through contactless interaction with an external adjustment tool.

A quartz crystal resonator unit has an overall length less than 2.1 mm and a base portion having a length less than 0.5 mm and a width less than 0.55 mm, vibrational arms, and mounting arms connected to the base portion through connecting portions. Each vibrational arm has a first vibrational portion including a first width and a first length within a range of 0.32 mm to 0.72 mm and a second vibrational portion including a second width greater than the first width and a second length less than the first length. A groove is formed in at least one main surface of the first vibrational portions of the vibrational arms, a width of the groove being less than 0.07 mm and a distance in the width direction of the groove being less than 0.015 mm. A width of the mounting arms is less than 0.45 mm and a width of the connecting portion is less than 0.41 mm.

A quartz crystal resonator unit has an overall length less than 2.1 mm and a base portion having a length less than 0.5 mm and a width less than 0.55 mm, vibrational arms, and mounting arms connected to the base portion through connecting portions. Each vibrational arm has a first vibrational portion including a first width and a first length within a range of 0.32 mm to 0.72 mm and a second vibrational portion including a second width greater than the first width and a second length less than the first length. A groove is formed in at least one main surface of the first vibrational portions of the vibrational arms, a width of the groove being less than 0.07 mm and a distance in the width direction of the groove being less than 0.015 mm. A width of the mounting arms is less than 0.45 mm and a width of the connecting portion is less than 0.41 mm.

The present invention relates to a timepiece comprising: a mechanical power source coupled to a time indicating display, a generator, wherein the mechanical power source is coupled to the generator, a regulator circuit configured for enslaving a generator frequency of the generator to a reference frequency, wherein the regulator circuit is configured for electrically braking the generator when the generator frequency is higher than the reference frequency, wherein the regulator circuit comprises: at least a first switch, at least a first inductor and at least a first capacitor, wherein the first switch and the first capacitor are arranged parallel to each other and wherein the first switch and the first capacitor are arranged in series with the first inductor.

The present invention relates to a timepiece comprising: a mechanical power source coupled to a time indicating display, a generator, wherein the mechanical power source is coupled to the generator, a regulator circuit configured for enslaving a generator frequency of the generator to a reference frequency, wherein the regulator circuit is configured for electrically braking the generator when the generator frequency is higher than the reference frequency, wherein the regulator circuit comprises: at least a first switch, at least a first inductor and at least a first capacitor, wherein the first switch and the first capacitor are arranged parallel to each other and wherein the first switch and the first capacitor are arranged in series with the first inductor.