隨著老年人口之增加，中高年齡層的人因膝關節退化或是下肢肌力不足，導致地面給予膝關節之衝擊過大，而不便出外盡情運動，造成身體孱弱及心理退縮，若有一輔具能幫助這些人走出戶外，豈不美哉?由於目前尚無針對這種需求所設計的輔具，因此本研究將透過力學觀點，設計一款儲能緩衝運動輔具，來幫助有此需要的人們。

本研究利用電腦輔助繪圖軟體及有限元素分析軟體進行模擬分析及尺寸設計，設計一儲能機構、緩衝簧片、固定支架、鬆脫機構，進而實際製作出一儲能緩衝輔具之原型。

本研究之運動輔具，在下壓時利用彈性元件來儲存能量，且不會造成身體之不適感，並能確實的給予使用者一支撐與上推的力量，讓使用者能更輕鬆的運動;在固定支架間係以軸承連結，使穿戴時下肢仍能輕易伸展與彎曲，不影響整體靈活度;在鞋底部分則利用波浪形之設計，增加緩衝時間，以減少膝關節之損傷。

Many middle age and senior people suffer from degenerative joints or weak lower limbs. To avoid bringing impacts to the joints, they would avoid doing outdoor sports. Yet this measure only makes them weaker physically and mentally. It will be great if there are devices that can help these people go out without worrying about their joints. Nevertheless, at the moment there is no such assistive device and to help those in needs, this study designed a sport assistive device that can store energy and offer a buffer effect based on some mechanical principles.
This study employed computer aided design software and finite element analysis software for simulating analysis and size designing. The authors first developed a store energy device, a buffer spring and a loosening device. Next, assembled these components to make a prototype of the energy-storing and buffer assistive device.
When pressing down the sport assistive device designed by the users, the generated energy will be stored by the spring component, so the user will feel more comfortable. In addition, this design can provide the user with force to support and to push upward. As a result, the user can do sports more freely. The fixtures are connected by bearing, so when the user is wearing the aid, users can still stretch or bend the lower limbs easily. In other words, the overall flexibility of the user is unaffected. The sole of the shoes has a wavy pattern, and this design is to increase buffer and thus prevent damaging the knee joints.

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