| 摘要 |
<p>The invention relates to a clock movement including a constant force device, said clock movement comprising a spiral spring (18) and a gear-train having a first kinematic chain (4, 5, 6, 8) arranged so as to connect a main power source (1) with a first end of the spiral spring, and a second kinematic chain (10, 12, 13, 14, 16) for connecting a time base to a second end of the spiral spring. The movement is characterised in that either one of the first and second kinematic chains includes an adjustment mobile (9) comprising first and second members (10, 20) connected together by a friction so that the rotation of one of the members drives the other one during the routine operation of the clock movement, and in that one of said members is an adjustment member (20) having at least one bearing surface (41) arranged in such a manner that it is possible to control the latter so as to rotate the adjustment member without rotating the other member (10), due to the friction, in order to adjust the load state of the spiral spring.</p> |
