Intraocular Lens Implanter Guide Structure for Stable Folding

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Solution Overview

Problem

Existing intraocular lens implanters face challenges in ensuring the operational reliability of the injection member and the folding direction of foldable lenses, with risks of the push pin separating from the lens surface and instability due to viscoelastic agent flow, particularly in preloaded systems.

Innovation Solution

The intraocular lens implanter incorporates a biasing means that applies a force from the second optic portion surface to the first optic portion surface, using a biasing member sandwiched between the injection member and the inner cavity, and a guide portion to ensure consistent folding direction, along with a guide member for the front supporting portion to enhance operational reliability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the intraocular lens is injected through the implanter, then the lens can be implanted into the eye, but the head portion of the push pin may separate from the side edge surface of the optic portion due to movement resistance

Engineering Contradiction:

Improvereliability of injection member contactVSAvoidmovement resistance during injection

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The biasing means applies a preliminary force to the push pin in the direction from the second optic portion surface to the first optic portion surface before and during injection. This counteracts the movement resistance that would otherwise cause the push pin head to separate from the optic portion side edge surface, maintaining reliable contact throughout the injection process.

Inventive Principle:

Principle #9Preliminary anti-action

Solution Approach 2:

The biasing member is pre-positioned between the injection member and the inner cavity of the implantation head to establish preliminary contact and force application. This ensures that the push pin maintains proper contact with the optic portion before injection begins and throughout the process, preventing separation due to resistance.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If the intraocular lens is folded or rolled during injection, then it can enter through a small incision, but the folding direction may be unstable due to viscoelastic agents

Engineering Contradiction:

Improvestability of folding directionVSAvoidinfluence of viscoelastic agents

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The biasing means applies a preliminary force to counteract the destabilizing influence of viscoelastic agents on the folding process. By maintaining consistent contact between the push pin and optic portion through the biasing force, the folding direction remains stable and predictable despite the presence of viscoelastic materials.

Inventive Principle:

Principle #9Preliminary anti-action

Solution Approach 2:

The biasing member acts as an intermediary between the injection member and the intraocular lens, mediating the forces during injection. This intermediary force ensures that the lens folds or rolls in the expected direction by compensating for the harmful effects of viscoelastic agents that would otherwise cause unstable folding.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If the gap between the lower surface of the optic portion and the lower surface of the inner cavity is reduced, then the folding reliability is improved, but the device complexity increases

Engineering Contradiction:

Improvereliability of folding processVSAvoidcomplexity of inner cavity structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The biasing member serves as an intermediary that maintains the necessary gap reduction for reliable folding without requiring complex structural modifications to the inner cavity. The biasing force achieves the contact condition needed for stable folding while keeping the overall device structure relatively simple.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 configuration improves the reliability of the injection operation by maintaining contact between the push pin and the lens surface, reducing the risk of separation and ensuring stable folding, even under viscoelastic agent impact, thus enhancing the precision and efficiency of intraocular lens implantation.

Implementation Method 1

a biasing means, which applies a force in a direction from the side of the second optic portion surface to the side of the first optic portion surface to the injection member

Methodology Applied

Scientific EffectMechanical Force: Mechanical Force

Data Source

PatentUS12629248B2Intraocular lens implanter and preloaded type intraocular lens implantation device

Publication Date: 2026.05.19 EYEBRIGHT MEDICAL TECH BEIJING

AI summary

An intraocular lens implanter and a preloaded type intraocular lens implantation device, which can improve the operational reliability of the injection member so as to improve the operational reliability of rolling or folding of the intraocular lens in an expected direction. In the intraocular lens implanter the inner cavity of the implantation head is provided with a guide portion, where the guide portion has a shape approaching the movement route of the push pin from rear to front, so that the push pin can push the movable piece of the pressing plate on the guide portion, and the movable piece applies downward force to the push pin in turn, thereby the push pin performs the injection operation under the state that the head portion of the push pin keeps in contact with the lower surface of the inner cavity of the implantation head.