Patent ID: 7735802

Claim:
A damper device comprising: a frame which is provided with an opening part; a baffle which is turnably supported on the frame to abut with the opening part and move away from the opening part; a drive unit for turnably driving the baffle to open and close the opening part for opening and closing a passage structured to pass fluid; the drive unit comprising: an output member whose tip end side is provided with an engagement part with the baffle and which is linearly advanced and retreated to and from the baffle to turnably drive the baffle; and a driving part for advancing and retreating the output member; and a wall part which is provided between the driving part and the baffle and which is formed with an output hole part through which the output member is penetrated; wherein the output member which passes through the output hole part is engaged with the baffle through the engagement part; and the engagement part is located apart from a first moving extended axis which is formed by movement of the output member penetrating through the output hole part; wherein the wall part is structured by using a housing in which the driving part is held; at least a part of the output member is structured to be adjacent to an inner wall of the housing; a linear guide part which is engaged with at least a part of the output member is formed on the inner wall of the housing so that the linear guide part guides the output member to move linearly; the turning axial line of the baffle is located on or in a vicinity of the first moving extended axis of the output member; and a width of the drive unit is set to be within a width of the frame in a direction where a second moving extended axis which is formed by movement of the engagement part is apart from and parallel to the first moving extended axis of the output member.