| 摘要 |
PURPOSE:To improve the cutting property of a scissors forceps by forming scissors edge parts whose opening angles are different in a scissors edge part of a scissors member. CONSTITUTION:On the rear end side of a first edge surface 17, a second oblique edge surface 18 forming by being inclined at some angle is formed so that the edge surface is turned to the pivotally supporting side (rear part) in the direction for allowing the edge surface part of the rear end part to draw back to the back side of an edge which becomes an edge root of scissors edge parts 14a, 15a. Also, these continuous first edge surface 17 and second edge surface 18 are determined so that an opening angle theta1 of an edge formed by a pair of second edge surfaces 18, 18 becomes smaller than an opening angle theta2 of an edge formed by a pair of first edge surfaces 17, 17, when scissors members 14, 15 are opened. In the beginning of incision, a pair of second edge surfaces 18, 18 are put on a tissue 19. Subsequently, when cutting advances by second edge surfaces 18, 18, first edge surfaces 17, 17 are put on the tissue 19 and cutting is executed. |
