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http://dx.doi.org/10.7736/KSPE.2013.30.4.434

Bending Mechanism Analysis and Bending Coupler Optimal Design for Laparoscopic Surgical Instrument  

Hwang, Dal Yeon (Department of Mechanical Design Engineering, Korea Polytechnic Univ.)
Moon, Dae Hoan (Display Research Center, Infovion Inc.)
Choi, Seung Wook (IERM Inc.)
Won, Jong Seok (Meerecompany Inc.)
Publication Information
Journal of the Korean Society for Precision Engineering / v.30, no.4, 2013 , pp. 434-441 More about this Journal
Abstract
Bending motion has been used in the surgical instruments with bending structures and tendon mechanisms. A simplified bending angle amplification ratio between the proximal and distal bending joint was derived in this article. The bending structure of disk and rib in the proximal joint was analyzed based on finite element method with an emphasis on the circumferential uniformity of bending stiffness. Regarding the distal joint, optimal design and sensitivity analysis was done with four design variables of outer and inner diameter, rib height and rib width while maximizing the deformation under the stress distribution below the yield stress. Outer diameter and rib width are most critical to maximum deformation as the outer diameter and inner diameters are so to maximum equivalent stress.
Keywords
Bending Angle Amplification; Surgical Instrument; Circumferential Compliance Uniformity; Optimal Design;
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Times Cited By KSCI : 3  (Citation Analysis)
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