Electronic timepiece
AssigneesCitizen Holdings Co., Ltd., Citizen Watch Co., Ltd.
InventorsTatsuo Sumida, Moto Yamashita
Life of this patent
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Abstract
Lubricating apparatuses (10, 20, 30, 40) that support the axes of a stator guide (70) and a rotor (50) fit into an opening of a stator (60) are separate components and by fitting the stator guide (70) and lubricating apparatuses (10, 20, 30, 40) into the cylindrically shaped opening of a constant diameter disposed in a bottom plate (80), a bearing can be configured that aligns the central axis of the opening of the stator (60) and the rotational axis of the rotor (50) with high precision. Additionally, the structure of the lubricating apparatus (10, 20, 30, 40) is simplified and configures an electronic timepiece that can use the bearing-less stator (60).
Claims4
A method for manufacturing an electronic timepiece having a rotor;
- a stator;
- a lubricating apparatus that has a substantially cylindrical shape and is disposed as a bearing of the rotor and for holding lubricant;
- and a stator guide that has a substantially cylindrical shape and is for maintaining a position of the stator, the method comprising:
- fitting and fixing the lubricating apparatus and the stator guide such that respective central axes are aligned to an opening that has a substantially cylindrical shape and is disposed in a bottom plate that is a primary member of the electronic timepiece, wherein
- prior to the lubricating apparatus and the stator guide being fitted into the opening, an outer diameter at a joint of the lubricating apparatus and an outer diameter at a joint of the stator guide differ.
Dependencies are inferred from the claim text.