PROBLEM TO BE SOLVED: To provide a chair with standing assist function which is configured to facilitate standing of a user with weak lower limb muscle or the like from a seated posture.SOLUTION: A base portion 12 connects between leg portions and a seat portion 14 is provided to be vertically displaced relative to the base portion 12. the vertical displacement of the seat portion 14 is guided by a guide bar 14A, a rack gear 16A is vertically extended to be fixed to a bottom surface of the seat portion 14, the rack gear 16A is meshed with a pinion gear, a rotation shaft is connected to the pinion gear, and a driven gear of a driving gear group is connected to the rotation shaft. The driven gear is connected to a driving gear of large diameter by an endless chain, and the driving gear is provided with an operation lever. An auxiliary spring 15 is provided between the seat portion 14 and the base portion 12 to bias the seat portion 14 upward relative to the base portion 12, and the operation force of the operation lever is assisted.COPYRIGHT: (C)2013,JPO&INPIT【課題】下肢の筋力の弱いユーザなどが着座した姿勢から起立しやすいようにした起立補助機能付き椅子を提供する。【解決手段】脚部の間をベース部12で連結し、座部14をベース部12に対して上下に変位し得るように設ける。座部14の上下変位をガイドバー14Aでガイドし、座部14の底面にラック16Aを上下方向に延ばして固定し、ラック16Aにピニオンを噛合させ、ピニオンに回転軸を連結し、回転軸には駆動ギア群の被駆動ギアを連結する。被駆動ギアは無端状チェーンによって大径の駆動ギアと連結し、駆動ギアには操作レバーを設ける。また、座部14とベース部12との間には補助ばね15を設け、座部14をベース部12に対して上方に向けて付勢し、操作レバーの操作力を補助する。【選択図】図1
