| 摘要 |
PURPOSE: A fluctuation bed is provided to make fluctuation possible in a state of bed and to limit fluctuation of a chair in a state of chair. CONSTITUTION: A fluctuation bed includes a seat unit(11), a backboard unit(21) connected to the seat unit and being capable of adjusting a reclining angle from a state of chair to a state of bed, a base unit(31) fluctuation-capably supporting the seat unit and a fluctuation lock mechanism(51) allowing and disallowing fluctuation of the seat unit. The fluctuation lock mechanism includes a lock member displacing corresponding to the reclining angle of the backboard unit while being formed in the seat unit, an engagement unit engaged with the lock member while being formed in the base unit, and allows fluctuation of the seat unit by separating the lock member from the engagement unit in the state of bed and is configured to restrict fluctuation of the seat unit by engaging the lock member with the engagement unit in the state of chair.
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