| 摘要 |
PROBLEM TO BE SOLVED: To provide an actuator which has increased pressure resistance to supply pressure of fluid and is applied to various applications.SOLUTION: The actuator 1 includes a base member 2, and an inner film member 3 and an outer film member 4 which are attached to the base member 2 by being bound with a thread 5. The inner film member 3 is attached to the base member 2 so as to swell when fluid is supplied. The outer film member 4 has fastening force to suppress swelling of the inner film member 3 and is attached to the base member 2 to have a surface area which is not more than a surface area when the inner film member 3 swells alone to the maximum. Thereby swelling of the inner film member 3 is suppressed by the outer film member 4 before swelling to the maximum and burst of the inner film member 3 can be prevented. Further the base member 2 facilitates fixing of the actuator 1 and a moving direction of the actuator 1 is restricted to one direction from the base member 2, and therefore the actuator becomes easy to be applied to various applications. |
