| 摘要 |
FIELD: medical engineering. SUBSTANCE: device has base, pulley embraced with drive rope with two branches which envelopes are attached to the base. Levers of the second to fifth digits and the first digit lever are kinematically coupled with the pulley and combined in pairs with axles by means of strips. The kinematical linkage of levers of pairs of digits is manufactured as spatial cam with geometrical closure and swinging pusher attached to bar having an opening which axis runs in perpendicular to its axis of oscillation where rocker axis of oscillation is set to enable swinging to take place. Openings are made on the rocker ends for finger pair lever axles to be turnable. Rocker axis of oscillation is in parallel relation to the finger levers pairs turn axis. The first finger lever driver has two implementation versions. According to the first version it is driven by the other profiled groove of the spatial cam. The short internal arm of the first finger bell-crank plays the role of the other swinging pusher. According to the second version the other swinging pusher is attached to the head member having swinging axle mounted in bearings fixed on the base. The first finger lever rotatable with resistance is set in the head member on the axle being in perpendicular relation to the axis of oscillation. Its angular position is set before using the prosthesis. The first finger lever trajectory is directed across the hand under the palm of the hand. EFFECT: simplified design; low cost. |
