| 摘要 |
PROBLEM TO BE SOLVED: To solve such a problem that in a foldable knife of one-hand opening and closing type, the conventional side lock mechanism cannot firmly fasten a blade of the knife, therefore, erroneously sometimes rotates the blade of the knife during an operation and, in a nail-mark, a thumb notch-thumb hole, etc., the opening and closing with one hand cannot be performed depending on an individual difference of a size of the hand, length and hardness of nails, etc.SOLUTION: Components of an edge 6 and a valley 8 in a rugged shape are incorporated in a pipe shaped rotation part 5 as in Fig 2, and a blade is thereby opened or closed only by extruding the blade with fingers and further the blade is not only fastened by a lock mechanism itself but also force of gripping the handle can be used for force for fastening the blade, and therefore the blade can be fastened firmly.SELECTED DRAWING: Figure 5 |
