| 摘要 |
<p>The present invention relates to an elastic structure using a phenomenon in which a soft sealing film moves reciprocally inside a 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 a pressure container. The present invention basically comprises: the pressure container which functions as a cylinder, and a variable piston having a form in which the soft sealing film is adhered near an opening, 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 the sealing film separates from being in close contact with an inner surface of the pressure container when pulled to move the variable piston (20). 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 cannot be enabled by a conventional piston.</p> |
