Detachable Gripping Piece Assembly for Stable Tissue Treatment Tools

Solution Overview

Problem

Existing treatment tools face challenges in efficiently assembling and disassembling components, particularly the gripping pieces, which are often welded, leading to complexity and instability due to elastic deformation and dimensional variations.

Innovation Solution

The treatment tool incorporates a movable gripping piece that can move in a first range and is restricted in a second range, allowing attachment and detachment at a specific position, using a drive portion to facilitate assembly and disassembly without welding, and includes a guide pin and arc portion for smooth operation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If gripping pieces are welded to ensure stable attachment, then attachment stability is improved, but assembly complexity and manufacturing difficulty increase

Engineering Contradiction:

Improveattachment stabilityVSAvoidassembly complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The gripping piece is divided into a fixed gripping piece and a movable gripping piece that can be detached. The movable gripping piece is attached to the fixed gripping piece through a simple attachment structure without welding, allowing for easy assembly and disassembly while maintaining stable attachment during use.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The gripping piece transitions from a static welded connection to a dynamic attachable-detachable connection. The movable gripping piece can be attached to and detached from the fixed gripping piece at specific positions, providing operational flexibility while ensuring stability during the treatment procedure.

Inventive Principle:

Principle #15Dynamics

2Reliability

If gripping pieces are welded to ensure stable attachment, then attachment stability is improved, but assembly time and productivity decrease

Engineering Contradiction:

Improveattachment stabilityVSAvoidassembly efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The gripping piece is divided into a fixed gripping piece and a movable gripping piece that can be detached. The movable gripping piece is attached to the fixed gripping piece through a simple attachment structure without welding, allowing for easy assembly and disassembly while maintaining stable attachment during use.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The gripping piece transitions from a static welded connection to a dynamic attachable-detachable connection. The movable gripping piece can be attached to and detached from the fixed gripping piece at specific positions, providing operational flexibility while ensuring stability during the treatment procedure.

Inventive Principle:

Principle #15Dynamics

3Reliability

If gripping pieces are welded to ensure stable attachment, then attachment stability is improved, but manufacturing precision requirements increase due to elastic deformation and dimensional variations

Engineering Contradiction:

Improveattachment stabilityVSAvoiddimensional accuracy

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The gripping piece is divided into a fixed gripping piece and a movable gripping piece that can be detached. The movable gripping piece is attached to the fixed gripping piece through a simple attachment structure without welding, allowing for easy assembly and disassembly while maintaining stable attachment during use.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The attachment mechanism utilizes elastic deformation within controlled parameters. The movable gripping piece can be attached to and detached from the fixed gripping piece at specific positions, and the structure accommodates dimensional variations through elastic deformation rather than requiring precise welding dimensions.

Inventive Principle:

Principle #35Parameter changes

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 simplifies assembly and disassembly, maintains a stable grip, and ensures reliable operation even with elastic deformation or dimensional changes, reducing the need for additional parts and maintaining a secure attachment.

Implementation Method 1

a blade inserted into the outer pipe to transmit ultrasound vibration from the proximal end toward the distal end

Methodology Applied

Scientific EffectUltrasound vibration: Ultrasonic Vibration

Data Source

PatentUS12588921B2Treatment tool, treatment tool assembling method, and treatment tool disassembling method

Publication Date: 2026.03.31 OLYMPUS CORPORATION(JP)

AI summary

A treatment tool includes: a sheath extending along a longitudinal axis; a fixed gripping piece protruding from a distal end of the sheath; a movable gripping piece that is movably attached to either the sheath or the fixed gripping piece, the movable gripping piece being configured to grip a living tissue between the movable gripping piece and the fixed gripping piece; and a movement restricting portion configured to allow movement of the movable gripping piece in a first range and restrict movement of the movable gripping piece in a second range different from the first range. The movable gripping piece is attachable to and detachable from either the sheath or the fixed gripping piece at a movement position within the second range.