关键词: 概念设计, 设计过程, 产品功能, 原理结构

Abstract: Function feature is a fundamental feature in the process of product design. By studying the effect of product function unit, working principle and components function surface, we presented principle component and functional connector definitions. Based on these definitions, we established a product principle structure model using object-oriented method and presented a process model of product design based on functionality.

Key words: concept design, design process, product function, principle structure