門鎖為日常生活中不可或缺之機械裝置，不僅給予人們安全防護，隨著使用者對於安全性與操作便利性之需求日益提升，現代榫眼鎖已發展出多樣化之複合功能。此特性使得多功能榫眼鎖在不同操作情境下，具備多種輸入源，且其輸入輸出傳遞路徑隨之變化，致使其設計與功能整合過程相對複雜。
為解決上述問題，本研究提出一套以模組化概念為核心之多功能榫眼鎖系統化設計流程。首先，依據各功能之操作路徑，將榫眼鎖劃分為多個單輸入單輸出之作動模組，並建立模組間之組合規則與限制條件，透過關係接頭碼描述模組間於不同操作狀態下之連接關係，以系統性方式滿足多功能操作需求。接著，開發一自動化設計工具以實現拓樸合成之自動化，並於尺寸合成階段輔以函數生成方式進行設計。
於設計案例驗證中，選取兩種具代表性之構型進行實作驗證。結果顯示，各項功能皆可順利實現，其運動模擬趨勢與實際作動結果相符，且實作模型之輸入與輸出總行程相對誤差皆小於5%。此外，相較於現有之專利設計，本研究所提出之設計流程可有效降低機構之桿件數量，在維持多功能需求之前提下，桿件數可由既有之12至14桿降低至10或11桿。綜合而言，本研究所提出之系統化設計流程具備可行性與實用價值，可作為未來多功能榫眼鎖設計之參考。

Door locks are indispensable mechanical devices in daily life, providing essential security protection. With increasing demand for safety and operational convenience, modern mortise locks have evolved to incorporate advanced features, resulting in multifunctional systems with multiple input sources and variable input-output transmission paths. This complexity poses significant challenges for design and functional integration.
To address these challenges, this study proposes a systematic, modular design process for multifunctional mortise locks. The mechanism is decomposed into single-input, single-output actuation modules along functional motion paths. Combination rules and relational joint codes are established to define module interconnections and systematically satisfy multifunctional requirements. An automated design tool supports topology synthesis, while function generation is applied for dimensional synthesis.
Two representative configurations were prototyped and physically validated. All functions were successfully realized, and simulation results were consistent with physical operation, with relative errors of total input and output strokes below 5%. Compared with existing patented designs, the proposed approach reduces the number of links from 12–14 to 10–11 while maintaining the required functionality. These results demonstrate the feasibility and practical value of the proposed design process, providing a reference framework for future multifunctional mortise lock designs.

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