Ultrasonic surgical instrument having detachable sleeve assembly

An ultrasonic surgical instrument comprising:

• a cannula component;
• and
• an instrument body, wherein the instrument body includes a scalpel bar for realizing an ultrasonic cutting effect, and wherein the cannula component is detachably connected to the instrument body by a detachable structure along a longitudinal axis of the scalpel bar, wherein
• the detachable structure comprises at least one first detachable component, and the instrument body is connected with the cannula component by the at least one first detachable component,
• the at least one first detachable component comprises a first boss, a first limiting slot, and a stopper,
• the first boss is located on the cannula component, and the first limiting slot and the stopper are located on the instrument body;
• or the first boss is located on the instrument body, and the first limiting slot and the stopper are located on the cannula component,
• the first limiting slot comprises a first slot parallel to the longitudinal axis of the scalpel bar and a second slot circumferential to the longitudinal axis of the scalpel bar,
• the first boss is configured to slide along the direction of the longitudinal axis of the scalpel bar in the first slot of the first limiting slot, and slide rotationally about the longitudinal axis of the scalpel bar in the second slot of the first limiting slot,
• the stopper is configured to slide along the direction of the longitudinal axis of the scalpel bar in the first slot of the first limiting slot, while being incapable of entering the second slot of the first limiting slot, and
• the detachable structure comprises a second detachable component, and the second detachable component comprises a second limiting slot located on the cannula component and a second boss located on the instrument body.