Patent ID: 7255473
Filing Date: 2007-08-14
Classification: G04B

Abstract:
1. A portable timepiece comprising: a case body having a pipe attaching hole; a winding stem pipe having a case body outside projected portion arranged at an outer portion of the case body and insertingly attached to the pipe attaching hole; a crown having a crown cylinder portion inserted into the winding stem pipe and removably provided to the case body outside projected portion; an urging member included in the crown cylinder portion for urging the crown in a direction of separating from the case body; and holding means having a plurality of communicating grooves along a rotational direction of the crown, a plurality of attaching and detaching through grooves communicated with the communicating grooves and opened to an end face of the case body outside projected portion, a plurality of holding grooves communicated with the communicating grooves, formed in a dead end shape and contiguous to the attaching and detaching through grooves and a plurality of engaging projected portions brought to and from the respective grooves for holding the crown attachably and detachably to and from the case body outside projected portion.