Portable timepiece
US7255473B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 13, 2006 |
| Grant date | Aug 14, 2007 |
| Priority date | — |
| Expiry date | Feb 10, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04B3/043
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
To provide a portable timepiece having high durability constructed by a constitution capable of promoting operability of attaching and detaching a crown and holding a crown in an unoperated state so as not to rotate the crown unpreparedly. In a winding stem pipe attached to a case body, a crown urged in a direction of separating from the case body by a coil spring (urging member) included in a crown cylinder portion of the pipe is removably provided to a case body outside projected portion of the winding stem pipe. An outer periphery of the case body outside projected portion is formed with a plurality of communicating grooves along a rotational direction of the crown, a plurality of attaching and detaching through grooves communicated to the communicating grooves and opened to an end face of the case body outside projected portion, and a plurality of holding grooves communicated with the communicating grooves and formed in a dead end state and contiguous to the through grooves. A plurality of engaging projected portion brought to and from the respective grooves are provided at a cover portion of the crown covering the case body outside projected portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.