Patent attributes
An air passage switching device includes a slide door slidable along first and second opening portions partitioned by a partition portion, a guide member for guiding the slide door, and a link mechanism for slidably moving the slide door along the guide member. The link mechanism includes a rotation shaft rotatably supported in a case, a link portion provided at one end portion of the slide door, and a link lever connected to the rotation shaft and the link portion. The link portion is rotatable around the rotation shaft only within a range of the second opening portion in a sliding direction, among the first and second opening portions. Furthermore, the slide door can be provided with a first seal portion for sealing a clearance with outer peripheral portions of the first and second opening portions, and a second seal portion for sealing a clearance with the partition portion.
