Intraocular Lens Injector Rolling Ball Mechanism
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Solution Overview
Problem
Conventional intraocular lens injectors often experience vibration and positional deviations during operation, leading to clogging issues due to misengagement of threaded portions and collisions, especially when using soft material lenses.
Innovation Solution
The intraocular lens injector features a moving member housed within a hollow body, with a reverse rotation prevention mechanism and a slider that deforms the lens into a prescribed shape, along with a takeout prevention mechanism to ensure smooth operation and prevent reverse return, thereby minimizing vibrations and clogging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the threaded portion of the screw member and the threaded portion of the injector body are engaged by pushing the screw member toward the injector body, then the plunger can be moved axially to push the intraocular lens, but the threaded portions may not engage smoothly causing vibration and impact
Solution Approach 1:
The patent applies preliminary action by pre-engaging the threaded portions of the screw member and injector body before the actual pushing operation. The screw member is rotated to advance the plunger to a predetermined position where the intraocular lens is properly positioned, ensuring smooth subsequent operation without vibration or impact during the critical lens release phase.
2Productivity
If the screw member is pushed toward the injector body to engage threaded portions, then the plunger moves axially to push the lens, but collision between members causes vibration and positional deviation
Solution Approach 1:
The patent applies dynamics by transitioning from a static threaded engagement mechanism to a dynamic rolling ball mechanism. The rolling balls between the screw member and injector body enable smooth, continuous motion without the impact and vibration associated with threaded engagement, maintaining high productivity while eliminating harmful vibrations and impacts.
3Reliability
If the intraocular lens is placed on the lens placement portion and pushed by the tip of the rod, then the lens can be injected, but positional deviation causes improper folding and clogging
Solution Approach 1:
The patent replaces the mechanical tip-of-rod pushing system with a rolling ball-driven plunger system. The rolling balls transmit motion smoothly to advance the plunger, which pushes the intraocular lens uniformly without the positional deviation and impact caused by tip contact, ensuring proper folding and preventing clogging.
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 significantly reduces vibrations and clogging, ensuring proper lens placement and release, simplifying the operation by eliminating the need for combined push-in and rotating operations, and maintaining the injector's appearance throughout the process.
Implementation Method 1
a first rolling portion comprising a plurality of first rolling balls 8a arranged in parallel in an axial direction of the screw member 8; a second rolling portion comprising a plurality of second rolling balls 9a arranged in parallel in the axial direction of the screw member 8
Data Source
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AI summary
An intraocular lens injector (1) includes: a hollow body having an injector body (5) provided with a lens placement portion (11) on which an intraocular lens is placed, and a screw member (8) with a first threaded portion (8b) formed thereon and connected to a rear end portion of the injector body (5), and rotatable around an axis of the injector body (5) without moving in an axial direction of the injector body; and a moving member (9, 10) having a second threaded portion (9c) that engages with the first threaded portion (8b) from an initial state before use, and configured to release the intraocular lens from a tip of an injection tube 7 by moving in an axial direction of the injector body (5) independently from the screw member (8) due to an engagement of the first threaded portion (8b) and the second threaded portion (9c), during a rotating operation of the screw member (8).