| 发明名称 | Temperature compensation-type balance, timepiece movement, mechanical timepiece and manufacturing method of temperature compensation-type balance | ||
| 摘要 | A temperature compensation-type balance includes a balance staff, and a balance wheel having a plurality of bimetal portions disposed in parallel to each other in a circumferential direction around a rotation axis of the balance staff. Connection members connect respective ones of the plurality of bimetal portions and the balance staff. Each bimetal portion is a layered body in which a first member and a second member are radially overlapped, and one end portion in the circumferential direction is a fixed end connected to a respective connection member and the other end portion in the circumferential direction is a free end. The first member is formed of a ceramic material, and the second member is formed of a metal material having a thermal expansion coefficient different from that of the first member. | ||
| 申请公布号 | US9235193(B2) | 申请公布日期 | 2016.01.12 |
| 申请号 | US201414185131 | 申请日期 | 2014.02.20 |
| 申请人 | SEIKO INSTRUMENTS INC. | 发明人 | Niwa Takashi;Nakajima Masahiro;Kawauchiya Takuma;Fujieda Hisashi;Shinke Manabu |
| 分类号 | G04B15/00;G04B17/00;G04B17/20;G04D3/00;G04B17/22;G04B17/06 | 主分类号 | G04B15/00 |
| 代理机构 | Adams & Wilks | 代理人 | Adams & Wilks |
| 主权项 | 1. A temperature compensation-type balance comprising: a balance staff that rotates about a rotation axis; and a balance wheel that has a plurality of bimetal portions which are disposed in parallel to each other in a circumferential direction around the rotation axis of the balance staff and extended in an arc shape along the circumferential direction of the rotation axis, and connection members which radially connect respective ones of the plurality of bimetal portions to the balance staff, wherein each bimetal portion is a layered body in which a first member and a second member that is disposed more radially outward than the first member are radially overlapped, one end portion of the bimetal portion in the circumferential direction is a fixed end connected to a respective connection member and the other end portion of the bimetal portion in the circumferential direction is a free end, and the second member has a second V-shaped engagement portion that is engaged with a first V-shaped engagement portion formed in the first member at the free end of the bimetal portion and is bonded to the first member to maintain the engagement therebetween the first member is formed of a ceramic material, and the second member is formed of a metal material having a thermal expansion coefficient different from that of the first member. | ||
| 地址 | JP | ||