Locating structure of expandable magnetic rod of screwdriver

作者: Chang-Ming Lin

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摘要: A screwdriver includes a handle, shank, and locating seat which is provided with plurality of receiving holes for tip. The shank at the free end thereof an opening fastening handle through hole in communication one extended to reach bottom handle. further longitudinally-oriented slot hole. An expandable magnetic rod received holes, such that fastened by screw, tip exposed from seat. cover.

参考文章(5)
Pi-Lien Lin, Combination screwdriver tool ,(1998)
Yung Hsu Huang, Tool having an extendible magnet ,(1997)
Brian A. Sweeny, Hand tool with reversible shaft ,(1997)