PROBLEM TO BE SOLVED: To provide a plant watering device for appropriately watering plants by changing a scheduled watering day according to the change of atmospheric humidity, requiring a reduced installation area, and having a reduced size.SOLUTION: An evaporation amount from an evaporation sheet attached to an evaporator increases as the atmospheric humidity decreases, and decreases as the atmospheric humidity increases, an ascending amount of a shaft is changed with a change in weight of the evaporator, and a watering start day is changed by the inflow of atmosphere passing from a hole of a bearing side through a notch part in the tip of the shaft. In terms of structure, the evaporator and a watering vessel are integrated together so as to enable reduction in size.COPYRIGHT: (C)2012,JPO&INPIT【課題】給水予定日が大気中の湿度の変化に応じて変化し、植物への適切な給水と、設置面積が少なくてすむ給水装置の小型化。【解決手段】蒸発器に取付けてある蒸発シ-トからの蒸発量は大気中の湿度が低ければ多く、高ければ少なくなることで蒸発器の重量変化に伴うシャフトの上昇量も変化し、軸受け側面の穴からシャフト先端の切欠き部を通る大気流入による給水開始日も変化する又、蒸発器と給水容器は構造上一体化しているので小型化が可能となる。【選択図】図1
