Disclosed is a timepiece assembly including at least two elements in contact and mobile relative to each other, one of the elements having at least a first contact surface intended to rub against at least a second contact surface of the other element under dry lubrication conditions. At least one of the first and second contact surfaces is covered with a hydrophobic coating having an angle of contact with water greater than 90, preferably greater than 100 and preferably greater than 110, and a coefficient of friction lower than 0.15, preferably lower than 0.12 and preferably lower than 0.1, the variation in the coefficient of friction as a function of the relative humidity being lower than 25%, preferably lower than 10% and preferably lower than 5%.

Disclosed is a timepiece assembly including at least two elements in contact and mobile relative to each other, one of the elements having at least a first contact surface intended to rub against at least a second contact surface of the other element under dry lubrication conditions. At least one of the first and second contact surfaces is covered with a hydrophobic coating having an angle of contact with water greater than 90, preferably greater than 100 and preferably greater than 110, and a coefficient of friction lower than 0.15, preferably lower than 0.12 and preferably lower than 0.1, the variation in the coefficient of friction as a function of the relative humidity being lower than 25%, preferably lower than 10% and preferably lower than 5%.

There are provided a component for a timepiece, a movement, and a timepiece having excellent lubricating oil holding performance. There is provided a component for a timepiece including a sliding surface having a surface tension of 10 to 35 mN/m. It is preferable that when lubricating oil having a surface tension of 25 to 35 mN/m is applied to the sliding surface, an interfacial tension between the sliding surface and the lubricating oil is 0 to 7 mN/m.

There are provided a component for a timepiece, a movement, and a timepiece having excellent lubricating oil holding performance. There is provided a component for a timepiece including a sliding surface having a surface tension of 10 to 35 mN/m. It is preferable that when lubricating oil having a surface tension of 25 to 35 mN/m is applied to the sliding surface, an interfacial tension between the sliding surface and the lubricating oil is 0 to 7 mN/m.

A bearing includes a shaft which pivots in the bearing. The shaft includes, at at least one end thereof, a shoulder via which the shaft is in contact with an opposite surface of the bearing. The shoulder is extended by a pivot engaged in a hole provided in the bearing. The opposite surface of contact of the bearing includes at least one hollow in order to reduce the surface of contact between the shoulder of the shaft and the bearing. Application is made to the production of a bearing for a shaft of a horology movement.

A bearing includes a shaft which pivots in the bearing. The shaft includes, at at least one end thereof, a shoulder via which the shaft is in contact with an opposite surface of the bearing. The shoulder is extended by a pivot engaged in a hole provided in the bearing. The opposite surface of contact of the bearing includes at least one hollow in order to reduce the surface of contact between the shoulder of the shaft and the bearing. Application is made to the production of a bearing for a shaft of a horology movement.

A cadence system consists of a mainspring powering a pump pumping a liquid through a regulation valve, providing a constant energy discharge of said mainspring, the system optionally being immersed in the liquid.

Timepiece with a movement driving an output wheel set, a passing strike or minute repeater mechanism, including a strike drive wheel set including a release ratchet with which cooperates a click for execution of a strike function, a strike uncoupling lever for moving any click away from the strike wheel set, including a first lever carrying the click and its spring, the output wheel set activating a second lever, the pivoting of which causes the first lever to pivot, the striking mechanism includes a torque smoothing jumper, which is returned by a first spring into abutment on the output wheel set, in order to use, when the second lever is not in mesh with the output wheel set, an equivalent torque to that which it uses when meshed with this output wheel set.

A micromechanical timepiece part includes a silicon-based substrate having at least one surface, at least one part of the surface having pores which open out at the external surface of the micromechanical timepiece part and the pores include a tribological agent. A method for producing a micromechanical timepiece part starting from a silicon-based substrate, the silicon-based substrate having at least one surface, at least one part of which is lubricated by a tribological agent, the method includes the steps of forming pores on the surface of the part of the surface of the silicon-based substrate, and depositing the tribological agent in the pores.

A micromechanical timepiece part includes a silicon-based substrate having at least one surface, at least one part of the surface having pores which open out at the external surface of the micromechanical timepiece part and the pores include a tribological agent. A method for producing a micromechanical timepiece part starting from a silicon-based substrate, the silicon-based substrate having at least one surface, at least one part of which is lubricated by a tribological agent, the method includes the steps of forming pores on the surface of the part of the surface of the silicon-based substrate, and depositing the tribological agent in the pores.