ultrasonic transducer

Abstract

The invention discloses an ultrasonic transducer, comprising an installing device, a crystal stack and a rear mass block, wherein the installing device is connected with a compression device; the crystal stack is arranged between the installing device and the compression device; and the rear mass block is arranged between the crystal stack and the compression device. The ultrasonic transducer is characterized in that both the contact end surface of the crystal stack and the contact end surface of the compression device are planes and are same in shape and size; the compression device is provided with a contact surface of the rear mass block contacted with the rear mass block; the contact surface of the rear mass block is centrosymmetric to the geometric center of the contact end surface of the compression device; and the area of the contact surface of the rear mass block is less than that of the contact end surface of the compression device. In the ultrasonic transducer, by improvement on the symmetry of the rear mass block, the uniformity of stress distribution in the ultrasonic transducer is improved, so that the efficiency of the ultrasonic transducer is improved.

Description

technical field [0001] The present invention generally relates to ultrasonic transducers and their applications, in particular sandwich-type ultrasonic transducers with compression means and their applications. Background technique [0002] In the prior art, ultrasonic emitting devices have various applications, such as for surgical treatment. Ultrasound transmitting devices typically include transducers that convert electrical energy into vibrations at ultrasound frequencies, which are transmitted to vibrate the tip of the surgical instrument. [0003] A sandwich-type high-efficiency ultrasonic transducer usually includes a mounting device and a rear mass, and a crystal stack is arranged between the mounting device and the rear mass, and the crystal stack is an alternate stack of piezoelectric elements and electrodes. Most of these high-efficiency ultrasonic transducers are pre-compressed, using compression bolts extending axially through the die stack to apply the compres...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the defect of uneven stress distribution in the piezoelectric element and electrode of the ultrasonic transducer in the prior art, especially to avoid deformation due to the asymmetry of the rear mass block, thereby affecting the stress distribution in the crystal pile Uniformity of

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