TOILET SEAT DEVICE

To provide a toilet seat device in which a toilet lid is easily opened and closed when a toilet lid of large weight is provided.SOLUTION: A toilet seat device includes a toilet seat, a toilet lid, a casing turnably supporting the toilet lid between a closed position and an opened position, and an assisting unit 90 which is provided in the casing and assists opening and closing operations of the toilet lid. The assisting unit includes a first spring 91 and a second spring 92. The first spring always energizes the toilet lid in an opening direction. The second spring does not energize the toilet lid in a closing direction in a first state in which the toilet lid is located between the closed position and a middle position and energizes the toilet lid in the closing direction in a second state in which the toilet lid is located between the middle position and the opened position.SELECTED DRAWING: Figure 6 【課題】重量の大きい便蓋を設けた場合にも、便蓋を開閉しやすい便座装置を提供する。【解決手段】便座と、便蓋と、前記便蓋を閉位置と開位置との間で回動可能に支持するケーシングと、前記ケーシングに設けられ、前記便蓋の開閉動作をアシストするアシストユニット９０と、を備え、前記アシストユニットは、第１ばね９１と、第２ばね９２と、を有し、前記第１ばねは、前記便蓋を常に開方向に付勢し、前記第２ばねは、前記便蓋が前記閉位置から途中位置までの間にある第１状態において前記便蓋を閉方向に付勢せず、前記便蓋が前記途中位置から前記開位置までの間にある第２状態において前記便蓋を閉方向に付勢することを特徴とする便座装置。【選択図】図６