Component for timepiece, movement, and timepiece

Patent metadata

Field	Value
Publication number	US-11520294-B2
Application number	US-201916292868-A
Country	US
Kind code	B2
Filing date	Mar 5, 2019
Priority date	Mar 9, 2018
Publication date	Dec 6, 2022
Grant date	Dec 6, 2022

Abstract

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.

First claim

What is claimed is:

1. A component for a timepiece, comprising a sliding surface having a surface tension of 10 to 35 mN/m,
wherein the sliding surface comprises an oil holding film comprising a compound represented by the formula (1):

wherein M 1 is silicon, titanium, or zirconium;
R is a hydrocarbon group;
each of Y 1 and Y 2 independently is a hydrocarbon group, a hydroxy group, or a functional group that generates the hydroxy group by hydrolysis; and
Z 1 is a polar group.

2. The component for a timepiece according to claim 1 , wherein, when a 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.

3. A movement comprising the component for a time piece according to claim 1 .

4. A timepiece comprising the movement according to claim 3 .

5. The component for a timepiece according to claim 1 , wherein the compound is selected from the group consisting of:

Assignees

• Seiko Instr Inc

Inventors

• Nakamura Takahiko
• Ebihara Natsuki

Classifications

• G04B31/08 Primary

  Lubrication {(self-lubricated plastic bearings G04B31/016; lubrication of the escape wheel G04B15/14; lubrication of synchronous clockworks G04C15/009; lubrication devices and lubricant containers G04D5/00)} · CPC title

• G04B15/14 Primary

  Component parts or constructional details, e.g. construction of the lever or the escape wheel {(assembly and manufacture of the spring G04B1/145; assembly and manufacture of components, e.g. pinions, spindles G04B13/02; lubrication of clockwork bearings G04B31/008; oils for clockwork bearings in general G04B31/08)} · CPC title

• G04B31/008

  Jewel bearings (G04B31/04 takes precedence) · CPC title

• G04B13/02 Primary

  Wheels; Pinions; Spindles; Pivots (bearings G04B31/00 {; chain wheels, spindles for chain wheels, also chains and driving weights G04B1/08}) · CPC title