Articles | Volume 9, issue 1
Research article
24 Apr 2018
Research article |  | 24 Apr 2018

Structural analysis of traditional Chinese hidden-keyhole padlocks

Kuo-Hung Hsiao

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Cited articles

Chen, B.-R.: Ancient Chinese Locks, BaiHua Edition, Tianjin, China, 2002 (in Chinese). 
Dimarogonas, A. D.: Machine Design: A CAD Approach, John Wiley and Sons Inc, New York, USA, 2001. 
Hommel, R. P.: China at Work, John Day Company, New York, USA, 1937. 
Hsiao, K.-H.: Structural Synthesis of Ancient Chinese Original Crossbow, T. Can. Soc. Mech. Eng., 37, 259–271, 2013. 
Hsiao, K.-H.: On the Structural Analysis of Open-keyhole Puzzle Locks in ancient China, Mech. Mach. Theory, 118, 168–179, 2017. 
Short summary
Hidden-keyhole padlocks are reconfigurable mechanisms and a category of ancient Chinese locks. This work presents a useful procedure to indicate and analyze the topology variabilities of hidden-keyhole padlocks. The variable chains of hidden-keyhole padlocks are presented by using the representation of kinematic pairs, from which all topology variabilities of padlocks in the operation are derived. Four main types of hidden-keyhole padlocks are provided as examples to illustrate the procedure.