An apparatus for producing a frictional and/or form-fitting connection including first and second components arranged to be moved linearly or rotated relative to one another for transmitting forces and/or force moments that act between the two components in a linear and/or rotational manner, wherein the first component surrounds the second component at least sectionally with at least one inner wall that faces the second component, and wherein the second component includes two elongated active face elements which are pivotable about a common rotational axis or about separate rotational axes that are directed parallel to one another in a region of one of the active-face elements and are transferred in a force-loaded manner from a first position, in which the active-face elements are spaced apart from an inner wall, into a second position, in which the active-face elements produce the frictional and/or form-fitting connection with the inner wall, wherein at least one mechanical stressing element is connected to ends of the active-face elements and exerts a restoring force which acts exclusively between the active-face elements and holds the active-face elements in the first position, and a kinematic system is provided acting upon the active-face elements opposite to the restoring force and is driven exclusively by a converter material, and wherein the kinematic system is connected to the active-face elements in a region of the active-face element ends and transfers the active-face elements into the second position;
- and wherein
- the kinematic system is a toggle lever that is connected to the active-face element ends over which a wire-shaped or strip-shaped converter material extends, wherein the converter material is connected to the active-face element ends and changes shape upon supplied with energy, the toggle lever is transferred into a spread position and the active-face elements can be transferred into the second position.