Linear drive mechanism

A linear drive comprising a rod-like rotationally locked output drive part guided for axial movement in relation to a housing using a bearing means cooperating with its outer periphery, said bearing means being provided in a bearing portion of said housing, at least one position preset element provided on the output drive part, such preset element being shifted on axial movement of the output drive part along a position preset space, wherein the bearing means extends around part of the periphery of the output drive part such that the output drive part is exposed in the bearing portion along a section of the periphery not cooperating with the bearing means so that in the bearing portion to the side adjacent to the output drive part there is a free space extending in its longitudinal and peripheral direction, such free space allowing for motion of the position preset element in the bearing portion, the housing further including a main body with an L-like cross section, said body carrying the bearing means.