| abstract |
An actuator capable of operating flexibly and flexibly and increasing an operation amount and an expansion / contraction ratio is provided. A tubular member (1a, 1b, 1c) having a different diameter and disposed coaxially with an interval is connected to an outer wall of an inner tubular member and an inner wall of an outer tubular member. An actuator having a structure in which a plurality of unit actuators are coaxially arranged by a possible actuator section (2) and provided with means for supplying driving energy to the actuator section (2). [Selection] Figure 5 |