Ultrasonic scalpel handle, ultrasonic scalpel and ultrasonic scalpel system

An ultrasonic scalpel, comprising an ultrasonic scalpel handle and a cutting tool detachably connected to the ultrasonic scalpel handle, the cutting tool comprising an inner tube, an outer tube and a tool bar which extend in a front-rear direction,

• wherein the tool bar runs through the inner tube, the outer tube sleeved outside the inner tube,
• wherein the ultrasonic scalpel handle comprises a handle housing and a transducer assembly, and the transducer assembly at least comprises a transducer, and the transducer comprises a horn shaft which extends in the front-rear direction,
• wherein the ultrasonic scalpel handle further comprises a connecting assembly, the connecting assembly comprises:
• a connector, an axis line of the connector extending in the front-rear direction, the connector having a hollow channel through which the inner tube can slide in from front to rear, a circumferential side wall of the connector provided with a plurality of through holes, and all the plurality of through holes distributed at intervals in a circumferential direction and communicated with the hollow channel;
• rolling balls, a number of the rolling balls equal to or less than a number of the plurality of through holes, and the rolling balls arranged in the plurality of through holes;
• a ball cap, the ball cap sleeved on a front portion of the connector in a manner that can slide in the front-rear direction, a yielding channel configured to accommodate the rolling balls being formed between a portion of an inner circumferential wall of the ball cap and an outer circumferential wall of the connector, and a position-limit structure configured to limit the rolling balls in the plurality of through holes being formed on another portion of the inner circumferential wall of the ball cap;
• and
• a first elastic element, the first elastic element disposed between the connector and the ball cap, and driving the ball cap to move forward, such that the position-limit structure limits the rolling balls in the plurality of through holes,
• wherein the inner tube comprises an inner tube body and a mounting boss extending rearward from an inner end of the inner tube body, an outer diameter of the mounting boss is larger than an outer diameter of the inner tube body, a position-limit surface is formed at a position where the inner tube body is connected to the mounting boss, an outer circumference of the mounting boss is a conical inclined surface with gradually increasing outer diameter from rear to front, the tool bar runs through the hollow channel in a manner that can slide in an axial direction, a rear end portion of the tool bar is fixedly connected with the horn shaft, the rolling balls are correspondingly embedded in the plurality of through holes in a fitted manner, the rolling balls are at least partially located in the hollow channel, and the position-limit surface is located behind the rolling balls.