An ultrasonic transducer

Abstract

The invention discloses an ultrasonic transduction device. The ultrasonic transduction device comprises a transducer and an amplitude-change pole. The amplitude-change pole comprises an input pole body and an output pole body, wherein the input pole body is connected to the transducer, the output pole body is connected to the connecting end of the input pole body, the center axis of the output pole body is perpendicular to the center axis of the input pole body, and a first output end and a second output end are both used for being connected with an ultrasound knife. By designing the amplitude-change pole into a T-shaped structure where the input pole body is connected with the output pole body, a resonant body is formed through connection of the amplitude-change pole and the transducer, the first output end and the second output end have large amplitude after the transducer is subjected to transmission and conversion through the T-shaped amplitude-change pole, and in this way, the ultrasonic transduction device with large amplitude and capable of realizing double drive output is obtained.

Description

technical field [0001] The invention relates to the field of medical equipment, in particular to an ultrasonic transducer. Background technique [0002] The ultrasonic scalpel system is widely used in the medical field. The core component of the ultrasonic scalpel system is the medical power transducer. The quality of the medical power transducer determines the surgical effect of the ultrasonic scalpel and the service life of the ultrasonic scalpel. Among them, the lower the impedance and the higher the efficiency, the better the medical power transducer, because the medical power transducer with low impedance and high efficiency can obtain greater mechanical energy of high-frequency vibration under the same input power condition, Output larger amplitude. [0003] In the prior art, Ethicon proposes an ultrasonic knife device: four piezoelectric ceramic sheets are symmetrically distributed in the center of the transducer, and the transducer has two symmetrically distributed ...

AI Technical Summary

Problems solved by technology

The inventors found that the above-mentioned ultrasonic knife device has the following defects: First, the above-mentioned ultrasonic knife device has a relatively large limit on the basic parameter amplitude of vibration, the reason is as follows: although the four piezoelectric ceramic sheets are symmetrically distributed in the center of the transducer, But there are only two pieces that really work on the amplitude, that is to say, the amplitude is twice as small as the traditional transducer in theory, so in order to make up for the lack of amplitude, higher requirements are put forward for the technical indicators of the piezoelectric sheet, and the increase The requirements may not be met in terms of technology, or the cost will be increased; secondly, the structural strength of the ultrasonic knife device is limited for the following reasons: in order to make up for the lack of amplitude, by reducing the diameter of the two terminal output faces, although in To a certain extent, the lack of amplitude is alleviated, but it cannot solve the fundamental problem that its amplitude is greatly limited. Moreover, the amplitude of the output end face is too small, and the strength of the structure cannot be guaranteed, which may seriously affect the service life of the transducer.

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