| 摘要 |
Timepiece sub-assembly including a balance spring stud arranged to be fastened to a balance cock, and a balance spring comprising an outer coil and an end plate of larger section than that of the outer coil, this stud including a housing arranged, in a first free state of the sub-assembly, to loosely contain the end plate with tangential mobility with respect to the outer coil, and, in a second immobilised state of the sub-assembly, to immobilise the end plate to which the housing is joined by a layer of adhesive covering a change-of-section shoulder and which forms a mechanical seal for the balance spring in a longitudinal direction of the housing, and the end plate includes an eye communicating with the layer in the second immobilised state. |
| 主权项 |
1. A timepiece sub-assembly, comprising a balance spring stud arranged to be fastened to a balance cock of a timepiece movement, and said sub-assembly comprising a balance spring, including in series and in order: a spiral wound part, an outer coil, a connection area, and an end plate of larger section than that of said outer coil, said end plate ending in a distal end opposite to said spiral wound part, said balance spring stud comprising, between an entry and an exit, a housing which is arranged, in a first free state of said sub-assembly, to loosely contain said end plate of said balance spring with tangential mobility in a tangential direction with respect to said outer coil in said connection area, and, in a second immobilised state of said sub-assembly, to immobilise said end plate to which said housing is joined by a layer of adhesive which secures said end plate and housing to each other, wherein, in said second immobilised state, said adhesive layer covers at least one change-of-section shoulder of said end plate, and wherein, in said second immobilised state, said adhesive layer forms a mechanical seal for said balance spring at least in a longitudinal direction of said housing substantially parallel to said tangential direction of said balance spring, wherein said end plate includes at least one eye communicating with said layer in said second immobilised state. |
