按鍵鎖是一種操作方便、不需鑰匙的密碼鎖具，為因應攜帶及保管鑰匙的不方便而發展出來的鎖具類型。本研究的目的是利用一套系統化的方法，進行多段式可變號按鍵鎖機構的概念設計。首先介紹機械鎖具的分類，並探討機械式按鍵鎖的分類、定義、及演變。機械式按鍵鎖依其操作方式可分為單段式、順序式、重複式、及多段式四種類型。由演變過程可知，多段式按鍵鎖同時具備順序式與重複式特性，因此藉由分析單段式、順序式、及重複式按鍵鎖機構的構造與特性，歸納出多段式按鍵鎖的設計需求與限制。進而，將現有單段式、順序式、及重複式按鍵鎖機構轉化為初步可行的多段式按鍵鎖，再利用創意性機構設計方法，配合設計需求與限制，合成出可行多段式按鍵鎖的機構設計圖譜，並針對所有的設計構想進行評估，選出兩種較符合需求的，進行整體設計，再藉由延伸設計產生新型的單段式、順序式、及重複式按鍵鎖機構。最後，利用電腦模擬及實體模型，驗證所設計的多段式按鍵鎖，的確能達到預期的作動需求。

Push-button lock is an easy-using kind of code lock. It was invented to solve inconvenience of carrying and taking care of keys. The purpose of this study is to synthesize mechanism design concepts of multi-step push-button locks based on a systematic approach. First of all, the classifications of mechanical locks are introduced, and the classifications, definition and development of mechanical push-button locks are described. Mechanical push-button locks can be classified into four types, including the one-step type, sequential type, repeatable type and multi-step type. The one-step, sequential, and repeatable push-button locks are further analyzed to conclude their structural characteristics as well as the design requirements and constraints of the multi-step push-button locks. Based on the Yan’s creative mechanism design methodology, the concepts and atlas of feasible designs are synthesized systematically. Two feasible mechanisms are further chosen for integral design. Finally, the developed computer simulation and physical model proves that the design results fulfill the requirements of motion.

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