Ultrasonic Blade Joint Structure for Compact High-Amplitude Treatment

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Solution Overview

Problem

Existing ultrasonic treatment tools face challenges in achieving efficient ultrasonic vibration amplitude and maintaining strong connections between the ultrasonic transducer and blade, particularly when the treatment unit is reduced in size.

Innovation Solution

The ultrasonic treatment tool design includes a protrusion on one component that fits into a recess on the other, with a thicker connection portion to enhance the connection strength and amplitude, while maintaining a compact size without a cross-sectional area change portion.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If the ultrasonic treatment unit is reduced in size, then the device becomes more compact and suitable for minimally invasive procedures, but the connection strength between the ultrasonic transducer and blade decreases

Engineering Contradiction:

Improvesize of ultrasonic treatment unitVSAvoidconnection strength between ultrasonic transducer and blade

Core Design Contradiction:

Volume of moving objectVSStrength

Solution Approach 1:

The patent applies local quality by creating a protrusion on one component (ultrasonic transducer or blade) that fits into a recess on the other component. This localized structural feature concentrates the connection strength at the interface without requiring the entire treatment unit to be larger, thus resolving the contradiction between compact size and connection strength.

Inventive Principle:

Principle #3Local quality

2Strength

If the connection portion thickness is increased, then the connection strength between ultrasonic transducer and blade is enhanced, but the overall size of the treatment unit increases

Engineering Contradiction:

Improveconnection strength between ultrasonic transducer and bladeVSAvoidsize of ultrasonic treatment unit

Core Design Contradiction:

StrengthVSVolume of moving object

Solution Approach 1:

The patent thickens only the connection portion (protrusion and recess interface) while keeping the rest of the treatment unit compact. This localized thickness increase provides enhanced connection strength without proportionally increasing the overall size of the ultrasonic treatment unit, effectively resolving the technical contradiction.

Inventive Principle:

Principle #3Local quality

3Power

If a horn is added to increase ultrasonic vibration amplitude, then the treatment effectiveness is improved, but the device complexity and size increase

Engineering Contradiction:

Improveultrasonic vibration amplitudeVSAvoidstructure complexity of ultrasonic treatment unit

Core Design Contradiction:

PowerVSDevice complexity

Solution Approach 1:

The patent achieves increased ultrasonic vibration amplitude at the blade's distal end through the protrusion-recess connection design itself, rather than adding a separate horn component. The geometric features of the connection portion are optimized to naturally amplify the vibration, thereby improving treatment effectiveness without increasing device complexity.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent merges the functions of connection strength enhancement and vibration amplitude increase into a single integrated protrusion-recess structure. This structure simultaneously provides mechanical connection and vibration amplification, eliminating the need for separate components like a horn, thus reducing device complexity while maintaining treatment effectiveness.

Inventive Principle:

Principle #5Merging (Combining)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This design secures strong connections and increases ultrasonic vibration amplitude at the blade's distal end, enabling effective treatment without the need for a horn, thus allowing for a smaller and more efficient ultrasonic treatment unit.

Implementation Method 1

an ultrasonic transducer configured to generate ultrasonic vibration, and an ultrasonic blade that is connected to a distal end portion of the ultrasonic transducer and that includes a treatment portion configured to apply the ultrasonic vibration generated by the ultrasonic transducer to a biological tissue

Methodology Applied

Scientific EffectUltrasonic vibration: Ultrasonic Vibration

Data Source

PatentUS20260020876A1Ultrasonic treatment tool

Publication Date: 2026.01.22 OLYMPUS MEDICAL SYST CORP

AI summary

An ultrasonic treatment tool includes: a tubular portion; and an ultrasonic treatment unit provided on a distal end side of the tubular portion, the ultrasonic treatment unit including an ultrasonic transducer configured to generate ultrasonic vibration, and an ultrasonic blade that is connected to a distal end portion of the ultrasonic transducer and that includes a treatment portion configured to apply the ultrasonic vibration to a biological tissue to treat the biological tissue, one of the ultrasonic transducer and the ultrasonic blade including a protrusion protruding toward another of the ultrasonic transducer and the ultrasonic blade, the other of the ultrasonic transducer and the ultrasonic blade including an insertion recess into which the protrusion is inserted, and being connected to the one of the ultrasonic transducer and the ultrasonic blade at a proximal end portion of the protrusion with the protrusion inserted into the insertion recess.