Design of a constant-force snap-fit mechanism for minimal mating uncertainty

Yi Ho Chen, Chao Chieh Lan

研究成果: Article同行評審

34 引文 斯高帕斯(Scopus)


For assembling injection-molded plastic parts having complicated geometry, snap-fit mechanisms are preferable to screws and chemical adhesives. The use of snap-fits relies on accurate calculation of interference and the associated mating force. The mating force is proportional to the interference, which is very sensitive to plastic part dimensional error. Insufficient interference would result in loose assembly, whereas excessive interference would impede assembly and possibly damage the thin-walled plastic parts. The possibility of unqualified interference impairs the high-value application of snap-fits to electronic appliances and automobiles. To alleviate the requirement for precise interference and to improve the assembly's robustness, this paper presents a constant-force snap-fit mechanism that maintains a regular mating force against a range of interference uncertainty. We propose a design formulation to find mechanism configurations that produce the most constant mating force. Illustrated simulations and experiments show that the mating force of the constant-force snap-fit is less sensitive to interference uncertainty than are typical snap-fits. Since uncertain mating force is minimized without demanding precise interference, we expect this mechanism to provide a ready alternative to existing snap-fit assembly applications.

頁(從 - 到)34-50
期刊Mechanism and Machine Theory
出版狀態Published - 2012 9月

All Science Journal Classification (ASJC) codes

  • 生物工程
  • 材料力學
  • 機械工業
  • 電腦科學應用


深入研究「Design of a constant-force snap-fit mechanism for minimal mating uncertainty」主題。共同形成了獨特的指紋。