This creation provides droplet suction device outside a kind of dental diagnostic chair mouth,Patient chair is equipped with headrest,Part pipeline neck interface is attracted to be incorporated in the back of headrest,And stretched to from headrest Hou side toward the side of headrest in front of the side of headrest,Attract the side front of part structural body what headrest amesiality,And have a suction inlet towards patient mouth side,And adjustment suction inlet can be rotated according to clinical use demand to the left or right side of patient,The negative pressure equipment that connection generates negative pressure suction force connect with negative pressure line and is connected to suction inlet with part structural body is attracted,Tooth bits, which are formed by droplet with aqueous vapor, to be recycled by the negative pressure suction force of suction inlet through negative pressure line,Thereby constitute this creation.本創作提供一種牙科診療椅用口外飛沫吸引裝置，診療椅設有頭枕，吸引件管線頸接口結合在頭枕的背部，且由頭枕後方往頭枕的側邊伸設至頭枕的側前方，吸引件結構體於頭枕的側前方偏向一側，且具有一吸入口朝向患者嘴側部，並可依臨床使用需求旋轉調整吸入口至患者的左側或右側，連接產生負壓吸引力之負壓設備與吸引件結構體以負壓管路連接且連通至吸入口，牙屑與水氣所形成的飛沫可由吸入口處之負壓吸引力經負壓管路而回收，藉此構成本創作。
