Intraocular Lens Insertion Tool Positioning Member Rotation Suppression
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Solution Overview
Problem
Conventional intraocular lens insertion tools face difficulties in smoothly releasing restrictions on the position and posture of the lens without affecting the lens or the tool, often resulting in interference or damage during the detachment of the positioning member.
Innovation Solution
The intraocular lens insertion tool incorporates a positioning member with a flat plate portion and rotation suppressing means, featuring two wall surfaces parallel to the flat plate portion to prevent rotation, ensuring smooth release of restrictions and preventing interference with the lens or tool.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the positioning member is removed during use to release restrictions on the intraocular lens, then the lens can be properly positioned and postured, but the positioning member may interfere with or damage the lens or tool during detachment
Solution Approach 1:
The positioning member is divided into a positioning member body and a detachable positioning member. The detachable positioning member can be separated from the positioning member body during detachment, allowing the main body to remain in place while only the necessary positioning component is removed. This segmentation prevents interference with the intraocular lens and insertion tool during the detachment process.
Solution Approach 2:
The detachable positioning member is extracted from the positioning member body during use. This extraction allows the positioning member to release its restrictions on the intraocular lens smoothly, while the detachable portion can be removed without interfering with the lens or tool, solving the contradiction between easy release and preventing damage.
2Stability of the object's composition
If the positioning member restricts the initial position and posture of the intraocular lens, then the lens is held securely, but the restrictions cannot be normally released during use
Solution Approach 1:
The positioning member transitions from a static restricted state to a dynamic releasable state. The detachable positioning member can be removed during use, transforming the system from a permanently restricted state to a dynamically controllable state where restrictions can be released when needed, while maintaining secure holding during transport and storage.
3Reliability
If the positioning member is mounted from the outside to the housing portion, then the lens is securely positioned, but the detachment process becomes complex and may affect the lens
Solution Approach 1:
The positioning member is segmented into a permanent positioning member body and a removable detachable positioning member. This segmentation simplifies the detachment process by allowing only the necessary positioning component to be removed, rather than detaching the entire positioning assembly, thereby reducing complexity while maintaining secure positioning during use.
Data Source
Figure 1(a)~1(b)
Figure 2(a)~2(b)
Figure 3
AI summary
Provided is a configuration in which when a positioning member is removed from an intraocular lens insertion tool, restrictions on the position and posture of an intraocular lens can be lifted smoothly without exerting influence on the intraocular lens and the insertion tool itself. The present invention is provided with: an approximately cylindrical nozzle body (10); a stage part which is provided in the nozzle body (10) and houses an intraocular lens; a plunger which presses the intraocular lens housed in the stage part by the forward end thereof to discharge the intraocular lens into an eyeball; and a positioning member (60) which restricts the initial position and posture of the intraocular lens by being mounted to the stage part from the outside. Rib sections (12g) are formed so as to extend in the front-back direction of the nozzle body (10) at the outer periphery of the stage part, and side wall parts (51, 51) and rotation prevention wall parts (59, 59) are formed in the positioning member (60) so as to sandwich the rib sections (12g, 12g) from both sides, thereby restricting the rotation of the positioning member (60) with respect to the stage part.