Pre-Loaded Intraocular Lens Cartridge With Haptic Position Control
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Solution Overview
Problem
Existing pre-loaded intraocular lens injection systems face issues with the intraocular lens shifting position during transportation, flipping, and the front haptic straightening out during injection, leading to potential eye damage and unsuccessful operations.
Innovation Solution
A pre-loaded intraocular lens injection system with a plunger and advancing knob that integrates rotation and pushing functions, featuring a detachable lens limiting member with a limiting plate and anti-straight-haptic column to maintain the lens's posture and prevent haptic straightening, while a stop block limits plunger displacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the intraocular lens is pushed by the pushing component, then the lens can be injected into the eye, but the lens flips and the front haptic straightens out, resulting in unsuccessful operation
Solution Approach 1:
The patent applies preliminary action by pre-positioning the intraocular lens in a cartridge before the injection procedure. The lens is held in a predetermined orientation within the cartridge, ensuring that when injection occurs, the lens maintains its correct posture (haptics folded, optical zone facing the correct direction) without requiring manual correction during the procedure.
Solution Approach 2:
The patent introduces a cartridge as an intermediary device between the lens and the injection system. The cartridge serves as a holding and delivery mechanism that maintains lens orientation and protects the lens during transport and injection, preventing haptic straightening and lens flipping that would occur with direct manual manipulation.
2Device complexity
If the intraocular lens is held without support during transportation, then the system is simple, but the lens position shifts and requires manual correction
Solution Approach 1:
The patent applies the nesting principle by placing the intraocular lens inside a cartridge, which itself is integrated into the injection device. The lens is nested within the cartridge's holding chamber, providing structural support and position stability during transport without adding significant external complexity to the overall system.
Solution Approach 2:
The lens is pre-positioned and secured within the cartridge before use, eliminating the need for manual positioning during transport. This preliminary securing action maintains lens stability throughout the transportation and injection process without requiring complex active stabilization mechanisms.
3Stability of the object's composition
If the pressing block compresses the lens to fix position, then the lens position is stabilized, but the lens is damaged under compression and injection action
Solution Approach 1:
The cartridge serves as an intermediary structure that supports the lens during compression and injection. Instead of directly compressing the soft lens material, the cartridge's rigid structure distributes and manages the compression forces, protecting the lens from damage while maintaining positional stability throughout the injection process.
Data Source
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AI summary
The present utility model discloses a pre-loaded intraocular lens injection system, including: a main cylinder, a plunger, an advancing knob, and a cartridge, where an introduction channel is formed inside the cartridge; a mounting recess for containing an intraocular lens is formed in the introduction channel, and a detachable lens limiting member is disposed on the mounting recess; and the lens limiting member includes a limiting plate, a stop block for preventing the plunger from extending into the introduction channel is disposed on the limiting plate in a movement direction of the plunger, and an anti-straight-haptic column is disposed on the limiting plate on a side of the movement direction of the plunger. According to the pre-loaded intraocular lens injection system, rotation and pushing functions are integrated, so that the injection accuracy is high; the limiting plate is configured to prevent the lens from being overturned, and the stop block and the anti-straight-haptic column are configured to prevent a front haptic from coming out straight, so that when being injected, the intraocular lens maintains such a posture that two haptics hold and cover an optical region; meanwhile, deformation of the intraocular lens can be avoided, and the stable position of the intraocular lens is ensured; and the system is easy and efficient to operate.