Abstract:
A mechanical hand comprises a palm element and at least two finger elements and incorporates a closed link mechanism. The two finger elements are connected at their basal ends, each with a joint, the first one to the palm element and the second one to the forward end of the first finger element, respectively. The closed link mechanism is constructed of the first finger element in combination with a projecting bar which stems at a certain angle from the basal end of the second finger element and constitutes a unitary part in conjunction with the second finger element. Driving this closed link mechanism by an actuator sets the finger elements to movement. When any portion of the finger elements comes into contact with an obstacle standing in its way, the closed link mechanism begins to change its form. In consequence of this change of form, the first finger element and/or the second finger element begins to turn round the joint as a pivot and continues, while adapting the form of the mechanical hand to the immediate environment, to converge in the direction of gradually conforming to the exterior contour of an object desired to be gripped and eventually gripping the object.