Patent ID: 11903604
Assignee: OLYMPUS CORPORATION
Field: Medical technology (Instruments)
Classification: CPC A  B | IPC A  B

Claim 9:
10. A treatment tool comprising:
an ultrasound transducer configured to generate an ultrasound vibration; and
a vibration transmission member that is connected to the ultrasound transducer, the vibration transmission member being configured to transmit the ultrasound vibration, wherein
the ultrasound transducer includes
a piezoelectric element unit including a plurality of piezoelectric elements configured to generate the ultrasound vibration, and
a horn that extends from a distal end toward a proximal end to define a longitudinal axis direction and that is connected to a distal end side of the piezoelectric element unit, the horn including:
a first transformation portion having a cross-sectional area orthogonal to the longitudinal axis direction that decreases toward a distal end, the first transformation portion being configured to amplify amplitude of the ultrasound vibration, and
a second transformation portion that is provided between the first transformation portion and a connection position at which the horn and the piezoelectric element unit are connected, the second transformation portion being configured to change the amplitude of the ultrasound vibration.