The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 06, 2001
Filed:
Oct. 21, 1998
Tatsuo Hara, Nagano-ken, JP;
Joji Kitahara, Nagano-ken, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
In an electronic watch including a so-called automatic winding dynamo, structures of parts themselves and layout of the parts are improved to achieve a reduction in thickness of the electronic watch. Bearing portions for a rotational shaft (,) of a dynamo rotor (,) are made up of hole jewels (,) and ring-shaped caps (,). The cap (,) covers, from the outer side, one end surface (,) of the hole jewel (,) which locates on the side facing a dynamo rotor (,), and defines a lubricant holding annular slot (G,) between the cap and an outer circumferential surface of the rotational shaft (,). Accordingly, even with the dynamo rotor (,) rotating at a high speed, a lubricant is prevented from scattering to the surroundings from the annular slot (G,). Spacings between adjacent parts can be narrowed and the thickness of the electronic watch can be reduced.