Brace rotating mechanism

摘要

A brace 14 is provided so as to be able to maintain the open position of a lid 13 of a keyboard musical instrument (grand piano) 10, is able to rotate between an erect position that maintains an open position of lid 13 and a collapsed position, and is able to be self-standing in the erect position. A position regulating section 23 is provided between brace 14 and body 11 of grand piano 10 that maintains an angle of rotation of brace 14 at a constant angle. <IMAGE> <IMAGE>