Ultrasonic scalpel bit

An ultrasonic scalpel bit, comprising a bit tip, a bit bar, and a bit body, one end of the bit bar being connected to the bit tip, and another end of the bit bar being connected to one end of the bit body, wherein:

• a main body of the bit tip is of a flat sheet structure, an upper and a lower face of which respectively form an upper bit ridge and a lower bit ridge of the bit tip;
• a protrusion is formed at a front end of the upper bit ridge;
• the upper bit ridge has a thickness greater than that of the flat sheet structure and that of the lower bit ridge;
• the protrusion is smooth and free of edges;
• wherein a front end of the bit tip is provided with a front-end bit blade;
• the protrusion extends beyond the front-end bit blade in an extending direction of the upper bit ridge;
• the front-end bit blade linearly extends perpendicular to the extending direction of the upper bit ridge and perpendicular to an extending direction of the lower bit ridge, wherein an end of the lower bit ridge of the bit tip forms a right angle with an end of the front-end bit blade;
• and
• the bit bar is of a hollow structure, the upper bit ridge is of a cylindrical structure, the hollow structure extending up to the front end of the bit tip, and a liquid injection hole is provided in a side face of the cylindrical structure of the bit tip.