Intraocular Lens Insertion Device with Pre-Bent Supporting Portion
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Solution Overview
Problem
Conventional intraocular lens insertion devices face challenges in stabilizing the distal end of the supporting portion during lens insertion, leading to instability and difficulty in accurately placing the lens within the eye.
Innovation Solution
An intraocular lens insertion device with a cylindrical insertion portion and a bending mechanism, where the supporting portion is bent backward by a protrusion, allowing for stable release and reduced movement of the lens, preventing the protrusion from blocking the insertion process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the intraocular lens is inserted through a small incision by folding the optical portion, then the incision size is reduced, but the distal end of the supporting portion becomes unstable and prone to free movement during insertion
Solution Approach 1:
The distal end of the supporting portion is bent backward in advance before insertion, so that when the lens is discharged from the nozzle, the curved portion is released first to stabilize the distal end before the optical portion is fully inserted into the eye
Solution Approach 2:
The supporting portion transitions from a bent state during insertion to a released/curved state after discharge, allowing dynamic adaptation: bent for stable insertion, released for proper positioning in the eye
2Ease of operation
If the distal end of the supporting portion is discharged first from the nozzle, then the lens can be inserted through a small incision, but the distal end is prone to free movement and instability
Solution Approach 1:
The distal end of the supporting portion is pre-bent backward before insertion, ensuring that when discharged, it releases and curves to stabilize itself before the optical portion enters the eye, preventing free movement and improving placement reliability
Data Source
Figure 1~2(B)
Figure 3~4
Figure 5(A)~5(C)
AI summary
An assembly for use with an insertion device includes a main body (3) having a plunger (4) that moves in a lens advancing direction (X) and an intraocular lens (100) having an optical portion (101) and one or more supporting portions (102) provided on an outer fringe of the optical portion (101). The assembly comprises an intraocular lens cartridge (2) that is configured to be attached to the insertion device main body (3) and that includes an internal lumen, a lens placement portion (11), a lens insertion opening (10) through which the intraocular lens (100) passes into the lens placement portion (11) while moving in the lens advancement direction (X), a nozzle portion (13) that communicates with the lens placement portion (11), and a protrusion insertion hole (2) that extends from the exterior of the intraocular lens cartridge (2) to the lumen; and a cartridge casing (22) including a main body (23) that is configured to be removably attached to the intraocular lens cartridge (2) and a protrusion (21). The intraocular lens cartridge (2) and the cartridge casing (22) are respectively configured such that the protrusion (21) extends through the protrusion insertion hole (20) and into the internal lumen at a location between the nozzle portion (13) and lens insertion opening (10) when the intraocular lens cartridge (2) is installed on the cartridge casing (22).