| 摘要 |
Watch cannon-pinion including a first bore for receiving a pivot-shank including, on either side of a recess, a first shoulder and a second shoulder. This cannon-pinion is made in two parts and includes, on the one hand, a body comprising internally the first bore and externally a support shoulder, and on the other hand, a shape memory alloy ring including a second bore, and, in the free state, the second bore has a larger diameter than that of the support shoulder when the ring is in a martensitic structure, and a smaller diameter than that of the support shoulder when the ring is in an austenitic structure. |
