創新可攜式坐立輔助機構之設計與模擬

Abstract

本研究係有關於創新輔助站立椅之設計與模擬。首先針對各種類型之輔 助站立椅，進行廣泛之論文及專利公報蒐集與分析，參考此分析結果後， 設計出一款新型可攜式輔助站立椅。 本研究的主要目的在於設計一種具有輔助站立功能的座椅，能讓下肢力 量不足者(膝關節可作動的扭力僅約40 Nm)在無旁人輔佐的情況下，自行操 作由坐姿轉為站立、或由站立轉為坐姿，且同時兼具攜帶性，使得日益重 視休閒品質的現代人，能將其帶出戶外使用。此輔助站立椅加上重力平衡 理論之應用，使得在支撐過程中任何階段都達到平衡，和一般的彈簧式輔 助站立椅相比，在安全上有顯著的提升。 首先將輔助站立座椅選訂適當的輔助彈簧後，依據參考的使用者標準坐 立運動軌跡數據，進行膝關節預估扭力分析與模擬，結果顯示使用者在輔 助站立座椅協助下僅需約40Nm 之膝關節扭矩便可不假外力自行站立，達到 原設計的預期功效。

This study proposes a novel design of the Sit-to-Stand Assisted Device (StS device), easy to plug together with existed chair. The new designed product can help people whose legs are unavailable easy to stand from sitting posture. Based on the results of patent search and market analysis, two of the major specification of the product come up to be portable and high mechanical advantage. While working on the design of the StS device, some typical design theories are adopted. First of all, a measured data of human moving postures from sit to stand is prepared for synthesizing a assisting linkage for properly guiding the body raising to stand posture. Then, considering the common body weight, the gravity balance theory is applied to determine the feasible spring components on the linkage for saving the stand effort supported from the muscle on the legs. The tips of the combination of the StS device with some specified chair is introduced. The practical and useful demonstrated examples of the assisting operation of the developed device for a typical examiner are also simulated and presented.