| Summary: | 碩士 === 明志科技大學 === 工業工程與管理系碩士班 === 105 === After hinges were applied to the personal computer industry in 1985, such mechanical bearings have been developed and implemented in various consumer electronics products. In 2012, the global market sharing of smart phones increased substantially, encouraging design trends for phone cameras with selfie and linkage arrangement functions (camera lens flipping and rotation) that are lightweight, thin, short, and compact. Under these trends, hinge applications have been extended to develop single cam type hinges. However, because this single-cam design contains only one mechanical part for supporting the deformation, the hinge is likely to possess endurance problems concerning fractures or defects of the cam spring.
This study used the plan–do–check–act (PDCA) cycle to improve the existent procedure in Company S to manage product defects. In addition, a cause-and-effect diagram was adopted to examine the relationship between product characteristics and primary and secondary quality factors. Accordingly, design factors affecting product quality were identified. Next, the 2k factorial design of experiments (DOE) was employed to plan related experiments, endurance testing, data collection, and data analyses, and Minitab software was used to objectively identify control factors for designing a single cam-type hinge and optimize related design parameters, thereby improving the structural endurance and torque specification of the hinge. The DOE concept and procedure were also incorporated into the endurance verification process of Company S; this enabled obtaining additional test results for cross comparison, thus enhancing the accuracy of hinge endurance testing.
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