| 摘要 |
<p>The present invention relates to an actuator using a phenomenon in which a soft sealing film moves reciprocally inside a pressure container while having a variable form, like a piston inside a cylinder, as the soft sealing film comes into close contact with or separates from the container. The present invention basically comprises: the pressure container which functions as a cylinder; and a variable piston comprising the soft sealing film, and a piston rod, wherein the pressure in a first pressure space (A) defined by the sealing film and the pressure container is set to be different from an nth pressure space (N) on the outside, so that when a compressed fluid is applied the sealing film, which is separated from an inner surface of the pressure container, comes into close contact with the inner surface of the pressure container to deliver driving force to the outside through the sealing film or via the piston rod which is connected to the sealing film. As a result, the pressure container, which can have a variety of shapes and sizes compared to a conventional cylinder having a cylindrical shape, can be used as the cylinder, and the distance and speed of form change can be simultaneously increased during a process of compressing and stretching the soft sealing film through repeated contact and separation, thereby exhibiting a wide range and a high speed of movement that is not achievable by a conventional piston.</p> |
