Hemostatic Clip Assembly via Mechanical Interlock

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Solution Overview

Problem

The existing hemostatic clip production process is difficult to operate and has a low yield rate due to the need for glue fixation of the clip holder and plastic sleeve, which complicates assembly.

Innovation Solution

The hemostatic clip employs an inner sleeve, transitional inner sleeve, clip holder, ball head pull rod, and steel micro balls, where the steel micro balls are fixed to the clip holder and the transitional inner sleeve is elastically deformed to separate from the clip holder by pulling the ball head pull rod, simplifying the assembly and operation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the clip holder and plastic sleeve are fixed by dispensing glue, then the connection is achieved, but the operation is relatively difficult and the yield rate is low

Engineering Contradiction:

Improveconnection reliabilityVSAvoidassembly ease

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent replaces the chemical bonding method (glue dispensing) with a mechanical connection system. The ball head pull rod with ball head engages with the plastic sleeve through a groove, creating a mechanical interlock that eliminates the need for glue. This mechanical system provides both reliable connection and ease of assembly through simple insertion and engagement motions.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The ball head pull rod serves as an intermediary component that connects the clip holder and the plastic sleeve. The ball head on the pull rod engages with the groove in the plastic sleeve, acting as a mediator that transfers force and motion between these two components without requiring direct glue bonding between them.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If the clip holder and plastic sleeve are fixed by dispensing glue, then the connection is achieved, but the yield rate is low

Engineering Contradiction:

Improveconnection reliabilityVSAvoidyield rate

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Ease of operation

If the transitional inner sleeve is elastically deformed to separate from the clip holder, then the separation mechanism is achieved, but the structural complexity increases

Engineering Contradiction:

Improveseparation operationVSAvoidstructural complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent applies dynamics by making the transitional inner sleeve elastically deformable. The sleeve can dynamically change its shape - deforming elastically during separation operation and returning to its original shape afterward. This dynamic property enables the separation function without requiring additional mechanical components, thus achieving ease of operation with minimal increase in structural complexity.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the physical parameter of the transitional inner sleeve by giving it elastic properties. This parameter change allows the sleeve to deform under applied force and return to its original configuration, enabling the separation mechanism to work through material property rather than complex mechanical structures.

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 the assembly process, increases the yield rate, and provides a reliable and easy-to-operate mechanism for opening, closing, and separating the hemostatic clip.

Implementation Method 1

the front end of the transitional inner sleeve is elastically deformed, to separate the transitional inner sleeve from the steel micro balls and the clip holder

Methodology Applied

Scientific EffectElastic deformation: Elasticity

Data Source

PatentUS11844529B2Hemostatic clip

Publication Date: 2023.12.19 BEIJING DONGLIN FUSHI MEDICAL DEVICES CO LTD

AI summary

The present invention discloses a hemostatic clip, including an inner sleeve, a transitional inner sleeve, steel micro balls, a clip holder, a ball head pull rod, and clamps. The ball head pull rod is accommodated in the transitional inner sleeve, the transitional inner sleeve is accommodated in the inner sleeve, the inner sleeve is limited between the transitional inner sleeve and the clip holder, the steel micro balls are clamped between the clip holder and the transitional inner sleeve, and the steel micro balls are fixed to the clip holder. By pulling the ball head pull rod, the transitional inner sleeve is driven to move backward, so that a front end of the transitional inner sleeve is elastically deformed, to separate the transitional inner sleeve from the steel micro balls and the clip holder.