| 摘要 |
PROBLEM TO BE SOLVED: To improve durability and sharpness for the body tissue of medical knives including knives for cutting open an affected area and surgical needles for suturing wounds. SOLUTION: Knife A has a top end 1, a cutting edge part 2 and a knife body part 3. The cutting edge part 2 has a top side cutting edge 4 which is formed on a top side 1 having two cutting edges 4e, 4f provided on both sides of a long edge of a triangular cross section, and a knife body part side cutting edge member 5 which is formed on the knife body part side having 2 cutting edges 5g, 5h arranged in succession with the cutting edges 4e, 4f at an angle facing a square cross section. A top side angle β between two cutting edges 4e, 4f of the top side cutting edge member is more than that of cutting edge angle α between two cutting edges 5e, 5h of the knife body part side cutting edge member 5, and the angle difference between the top side angle β and cutting edge angle α is set in the range of 20 degrees to degrees. |
