PROBLEM TO BE SOLVED: To provide an operation switch member of a motor-driven bed which does not pressurize the body of a bed user even when the back bottom of the motor-driven bed is swung in the state that the bed user holds a holding part.SOLUTION: The operation switch member 10 of the motor-driven bed for swinging the back bottom 23 has the holding part 2 provided with an operation switch 3 to be held by the bed user and a drive part for moving the holding part 2 in linkage with the operation of the back bottom 23. The drive part moves the holding part 2 so that the holding part 2 enters an area, centering on a reference track when the reference point of the holding part 2 whose position relation to the back bottom 23 is fixed is moved on the basis of the swing of the back bottom 23, between an upper limit track by an upper limit value higher than the reference track by &alpha and a lower limit track by a lower limit value lower than the reference track by &beta.COPYRIGHT: (C)2008,JPO&INPIT【課題】ベッド使用者が把持部を把持した状態で電動ベッドの背ボトムの揺動を行ってもベッド使用者の身体を圧迫しない電動ベッドの操作スイッチ部材を提供する。【解決手段】背ボトム23を揺動させる電動ベッドの操作スイッチ部材10において、操作スイッチ3が設けられベッド使用者が把持する把持部2と、この把持部2を背ボトム23の動作と連動させて移動させる駆動部とを有し、駆動部は、背ボトム23に対する位置関係が固定された把持部2の基準点が、背ボトム23の揺動に基づいて移動するときの基準軌跡を中心として、その基準軌跡よりαだけ高い上限値による上限軌跡と基準軌跡よりもβだけ低い下限値による下限軌跡との間の領域に把持部2が入るように、把持部2を移動させる。【選択図】図7
