Lancet Cap Alignment via Protrusions for Fine Needle Precision
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing lancets with fine needles face difficulties in precise twisting of the lancet body and cap, leading to bent puncturing members that penetrate the skin at an inclined angle, causing increased pain due to resistance from body tissue.
Innovation Solution
A lancet design featuring a front end portion and cap integrated via a weakened portion with an imaginary plane and flat surface, ensuring planar contact during twisting to prevent bending of the puncturing member, allowing for precise alignment and perpendicular penetration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the lancet body and cap are twisted in opposite directions to break the weakened portion, then the lancet can be prepared for use, but the distal end portion of the puncturing member bends and penetrates at an inclined angle causing increased pain
Solution Approach 1:
The patent applies preliminary action by pre-forming protrusions on the end faces of the lancet body and cap before use. These protrusions are positioned to guide the twisting motion and maintain alignment of the puncturing member during the breaking of the weakened portion, preventing bending before it occurs during the preparation process
Solution Approach 2:
The protrusions act as intermediary elements between the lancet body and cap during twisting. They serve as guide surfaces that mediate the relative motion between the two components, ensuring that the puncturing member remains aligned and does not bend during the breaking operation
2Object-affected harmful factors
If a fine needle is used as the puncturing member, then the pain during puncturing is reduced, but the difficulty in precise twisting increases and the distal end portion bends more easily
Solution Approach 1:
The protrusions are pre-formed on the end faces to create guiding surfaces that maintain alignment during twisting. This preliminary structural preparation ensures that even when using fine needles that are more susceptible to bending, the puncturing member remains properly aligned throughout the breaking operation
Solution Approach 2:
The patent applies local quality by adding protrusions only at specific locations on the end faces where alignment is critical. These localized structural features provide the necessary guiding function without affecting the overall flexibility or other properties of the lancet components
Data Source
AI summary
A lancet includes a lancet body having a distal end portion of a puncturing member protruding from the front end portion thereof, and a cap that houses and protects the distal end portion of the puncturing member that protrudes before use, wherein the front end portion of the lancet body and the rear end portion of the cap are integrated in substantially adjoining state with each other via a weakened portion. One of the end face at the front end portion of the lancet body and the end face at the rear end portion of the cap that opposes the former has protrusions, and the top ends of the protrusions define an imaginary plane that extends perpendicularly to the longitudinal direction of the puncturing member, and the other end face defines the flat surface that extends perpendicularly to the longitudinal direction of the puncturing member.