| 摘要 |
PCT No. PCT/FR90/00052 Sec. 371 Date Jul. 5, 1991 Sec. 102(e) Date Jul. 5, 1991 PCT Filed Jan. 24, 1990 PCT Pub. No. WO90/09628 PCT Pub. Date Aug. 23, 1990.The locking device (100) includes a pivoting ratchete (10) and a component (30) that is movable between two extreme stop positions. The pivoting ratchet (10) is symmetrical about a plane including its pivot axis (35), and it includes first and second locking fingers (15, 25) each of which is designed to engage in stable manner and under the action of a load (F) acting on the moving component (30) in a corresponding one of symmetrical notches (50a, 50b) formed in the moving component. A spring (20) is mounted in a prestressed state so that for a given resilient reaction (R1) thereof, the distance of said reaction from the pivot axis (35) of the ratchet (10) in either of the two stable locking positions is such that the ratchet (10) is unlocked by applying the smallest load that is likely to be applied to the moving component (30) in the direction that tends to switch it from one extreme stop position to the other. The device is applicable in space, in particular for telescopes and solar cell panels, and for docking devices, it also has Earth applications, in particular for special screwdrivers, for automatic tool dispensers, for detecting positions, or for detecting reversal of motion. |
