BALANCE, TIMEPIECE MOVEMENT, TIMEPIECE AND MANUFAC

专利名称：BALANCE, TIMEPIECE MOVEMENT,

TIMEPIECE AND MANUFACTURINGMETHOD OF BALANCE

发明人：Masahiro NAKAJIMA,Takashi NIWA,Takuma

KAWAUCHIYA

申请号：US14097300申请日：20131205

公开号：US20140185418A1公开日：20140703

专利附图：

摘要：There is provided a balance which includes a balance staff which is pivotally

supported rotatably; and a balance wheel which is arranged around the balance staff andin which one end portion is a fixed end portion fixed to a connection arm which is radiallyconnected to the balance staff and the other end portion is a free end portion which canbe radially deformed. The balance wheel has a first rim which is connected to theconnection arm and a second rim which is arranged to be overlapped with the first rimand formed of a material having a linear expansion coefficient different from the first rim,and the first rim and the second rim are bonded together by using a melting portion inwhich respective materials thereof are melted.

申请人：SEIKO INSTRUMENTS INC.

地址：Chiba JP

国籍：JP

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