| 摘要 |
<p>The invention concerns a device for locking/unlocking the movement of a notched member (1), characterised in that it comprises a toothed wheel (2), having a coaxial bore (3c) and whereof the teeth (3a) have a pitch equal to that of the member, and a fixed shaft (4) about which is mounted the toothed wheel (2), said shaft (4) having a diameter less than that of the bore of the wheel (2) such that, subsequent to a radial clearance (5), the wheel is capable of moving between a centred unlocking position wherein the tops of the teeth (1a) of the notched member closest to the wheel (2), are located outside the pitch circle P of the wheel and the member (1) can then move freely, and an off-centre locking position, when the member (1) exerts on the wheel (2) a force F directed towards the axis (O1) of the shaft (4), position wherein the top of the tooth (1a) of the member (1) is located, between two teeth (3a) of the wheel (2), inside the pitch circle P, so that the member (1) and the wheel (2) are mutually locked.</p> |
