| 摘要 |
PURPOSE: To achieve weight reduction of the whole body of a cutting device without depending on the diameter of tubes by providing an extension end part extended in a direction of a tube 1 on a fixed core member around which a coil is provided, and forming the extension end part to direct a field formed by the coil to the fixed core member, the extension end part, and a free core member. CONSTITUTION: A blade 4 disposed inside a tube 1 to be cut cooperates with a counter-blade member 5 mechanically connected to a free core member 6 of strong magnetic permeability to cut the tube 1. A field is formed by a coil 8 on a free core member 6 to cross the tube 1 to magnetically apply to a length direction position of the free core member 6, that is the position of the counter- blade member 5. On a fixed core member around which the coil 8 is wound, extension end parts 10a, 10b extended toward the tube 1 and having holes 13a, 13b for the tube 1 to pass through are provided. The extension end parts 10a, 10b surround the tube 1 around two sections parted from each other for a roughly similar length to length of the free core member 6 to direct the field to the fixed core member 9, extension end parts 10a, 10b, and free core member 6. |
