Patent ID: 8790333

Claim:
A skull cutting device for cutting a skull by means of laser, comprising: a body that emits the laser introduced from a laser oscillator through an optical fiber from an exit opening, the exit opening arranged at a distal end thereof; a contact portion arranged at the distal end of the body to contact a surface of the skull, the contact portion comprising more than three rolling members arranged around the exit opening to contact the surface of the skull, and a distal end of each rolling member is arranged on a virtual plane orthogonal to the optical axis; a support bar extending from the body toward an emitting direction of the laser while avoiding an optical path of the laser, the support bar configured to penetrate the skull and extend to a back surface of the skull; a light interception board that is supported at a distal end of the support bar and that blocks farther advance of the laser by diffusing the laser boring through the skull when inserted between the back surface of the skull and a surface of the brain in a state that the contact portion makes contact with the surface of the skull; and a convex lens element converging the laser at a focal point between the virtual plane formed by the distal ends of the rolling members and the light interception board.