초록 ▼

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

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.

대표청구항 ▼

What is claimed is: 1. An air passage switching device comprising: a case for defining an air passage, the air passage having adjacent first and second opening portions partitioned from each other by a partition portion; a slide door slidable along the first and second opening portions in a sliding

What is claimed is: 1. An air passage switching device comprising: a case for defining an air passage, the air passage having adjacent first and second opening portions partitioned from each other by a partition portion; a slide door slidable along the first and second opening portions in a sliding direction; a guide member, provided in the case, for guiding the slide door to be slidable; and a link mechanism for slidably moving the slide door along the guide member, wherein: the link mechanism includes a rotation shaft rotatably supported in the case, a link portion provided at one end portion of the slide door in the slide direction, and a link lever connected to the rotation shaft and the link portion; the link portion is positioned at a tip end portion of the link lever, and is rotatable around the rotation shaft only within a range of the second opening portion in the sliding direction, among the first and second opening portions; and the slide door is 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. 2. The air passage switching device according to claim 1, wherein the link portion is connected to the slide door at least at one position inside the first seal portion in the sliding direction. 3. The air passage switching device according to claim 1, wherein the link portion is provided at a first end position of the slide door, close to the second opening portion when the slide door fully closes the first opening portion, the air passage switching device further comprising a guide pin provided at a second end portion far from the second opening portion when the slide door fully closes the first opening portion, wherein only the guide pin is engaged with the guide member to be slidable relative to the guide member. 4. The air passage switching device according to claim 3, wherein: the first opening portion and the second opening portion are arranged on surfaces bent at the partition portion; the partition portion is bent to correspond to the bent surfaces; the guide member is arranged only in a range corresponding to the first opening portion in the sliding direction; and the first end portion of the slide door is bent to correspond to the bent partition portion. 5. The air passage switching device according to claim 1, wherein the guide member is provided, such that a press-contacting force of the first and second seal portions of the slide door to the outer peripheral portion of the first and second opening portions and the partition portion is larger when the slide door fully closes one of the first and second opening portions, as compared with a case where both the first and second opening portions are opened by the slide door. 6. The air passage switching device according to claim 1 being used for an inside/outside air switching box of a vehicle air conditioner, wherein: the first opening portion is used as an outside air introduction port for introducing air outside a passenger compartment into the case; the second opening portion is used as an inside air introduction port for introducing air inside the passenger compartment into the case; and the partition portion is bent to protrude upstream from the first and second opening portions in an air flow direction. 7. The air passage switching device according to claim 6, wherein the link portion is provided at a first end position of the slide door, close to the second opening portion when the slide door fully closes the first opening portion, the air passage switching device further comprising a guide pin provided at a second end portion far from the second opening portion when the slide door fully closes the first opening portion, wherein only the guide pin is engaged with the guide member to be slidable relative to the guide member. 8. The air passage switching device according to claim 7, wherein: the first opening portion and the second opening portion are arranged on surfaces bent at the partition portion; the partition portion is bent to correspond to the bent surfaces; the guide member is arranged only in a range corresponding to the first opening portion in the sliding direction; and the first end portion of the slide door is bent to correspond to the bent partition portion. 9. The air passage switching device according to claim 1 being used for an air mixing portion of a vehicle air conditioner which includes a cooling unit disposed in the case for cooling air, and a heating unit disposed in the case downstream from the cooling unit for heating air, wherein: the first opening portion is provided upstream from the heating unit to communicate with a warm air passage of the heating unit; the second opening portion is provided upstream from the heating unit to communicate with a bypass passage through which air from the cooling unit bypasses the heating unit; and the partition portion is bent to protrude downstream from the first and second opening portions in an air flowing direction. 10. An air conditioner for a vehicle, comprising: a case for defining an air passage through which air flows into a passenger compartment of the vehicle, the case having adjacent first and second opening portions partitioned from each other by a partition portion, for introducing air inside the passenger compartment and air outside the passenger compartment; a slide door slidable along the first and second opening portions in a sliding direction to open and close the first and second opening portions; a guide member, provided in the case, for guiding the slide door to be slidable; and a link mechanism for slidably moving the slide door along the guide member, wherein: the link mechanism includes a rotation shaft rotatably supported in the case, a link portion provided at one end portion of the slide door in the slide direction, and a link lever connected to the rotation shaft and the link portion; the link portion is positioned at a tip end portion of the link lever rotatable around the rotation shaft; and the link portion is rotatable around the rotation shaft only within a range of the second opening portion in the sliding direction, among the first and second opening portions. 11. The air conditioner according to claim 10, wherein the slide door is 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. 12. The air conditioner according to claim 10, wherein the link portion is provided at a first end position of the slide door, close to the second opening portion when the slide door fully closes the first opening portion, the air conditioner further comprising a guide pin provided at a second end portion far from the second opening portion when the slide door fully closes the first opening portion, wherein only the guide pin is engaged with the guide member to be slidable relative to the guide member. 13. The air conditioner according to claim 12, wherein: the first opening portion and the second opening portion are arranged on surfaces bent at the partition portion; the partition portion is bent to correspond to the bent surfaces; the guide member is arranged only in a range corresponding to the first opening portion in the sliding direction; and the first end portion of the slide door is bent to correspond to the bent partition portion. 14. An air conditioner for a vehicle, comprising: a case for defining an air passage through which air flows into a passenger compartment of the vehicle, the case having adjacent first and second opening portions partitioned from each other by a partition portion in the air passage; a cooling unit disposed in the case for cooling air; a heating unit disposed in the case downstream from the cooling unit to heat air, the heating unit being arranged to form a bypass passage through which air from the cooling unit bypasses the heating unit; a slide door slidable along the first and second opening portions in a sliding direction to open and close the first and second opening portions which communicate with a passage of the heating unit and the bypass passage, respectively, between the cooling unit and the heating unit in an air flowing direction; a guide member, provided in the case, for guiding the slide door to be slidable; and a link mechanism for slidably moving the slide door along the guide member, wherein: the link mechanism includes a rotation shaft rotatably supported in the case, a link portion provided at one end portion of the slide door in the slide direction, and a link lever connected to the rotation shaft and the link portion; the link portion is positioned at a tip end portion of the link lever rotatable around the rotation shaft; and the link portion is rotatable around the rotation shaft only within a range of the second opening portion in the sliding direction, among the first and second opening portions. 15. The air conditioner according to claim 14, wherein the slide door is 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.