Blood Lancet Device with Adjustable Depth and Linear Guidance
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Solution Overview
Problem
Existing blood lancet devices have fixed depth penetration, leading to potential skin thickness mismatches, neglect in lancet replacement causing infections, and pain during blood collection due to non-linear needle motion.
Innovation Solution
A blood lancet device with an adjustable plunger and ejector mechanism that ensures linear motion of the lancet, reduces pain through sawtooth projections, and prevents infection by complete lancet ejection with a user-interactive process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the needle penetration depth is fixed, then the device structure is simple, but it cannot adapt to different skin thicknesses and body parts
Solution Approach 1:
The patent implements a dynamic depth adjustment mechanism where the outer tip can be rotated to change the exposure length of the lancet needle. This allows the penetration depth to be dynamically adjusted according to different skin thicknesses and body parts, resolving the contradiction between fixed structure simplicity and adaptability requirements.
2Reliability
If the lancet is not completely removed, then the device structure is simple, but infection risk increases due to repeated use
Solution Approach 1:
The patent employs an ejection mechanism that completely extracts the lancet from the device after use. The ejector pushes the lancet out of the plunger, ensuring complete removal and disposal, which prevents infection risks associated with repeated use while implementing a structured ejection process.
3Object-affected harmful factors
If the needle motion is not linear, then the device structure is simple, but pain increases due to skin scratching
Solution Approach 1:
The patent introduces rails and rail grooves as intermediary guiding structures. The rails on the plunger fit into the rail grooves in the fixed tube, acting as intermediaries that constrain and guide the plunger's motion to ensure strictly linear movement of the lancet needle, thereby preventing skin scratching and reducing pain.
4Strength
If the outer tip projection is smooth, then the device is less painful, but the lancet cannot penetrate the skin effectively
Solution Approach 1:
The patent applies local quality differentiation to the outer tip: the front surface is designed with a sharp projection for effective skin penetration, while the side surface remains smooth to minimize pain. This localized differentiation of surface properties allows the device to achieve both penetration effectiveness and pain reduction.
Data Source
AI summary
This invention relates to a blood lancet device that is used to collect a small quantity of blood from a human body. More specifically, it relates to a blood lancet device that: can control the depth of the lancet needle's penetration of the skin; can push the lancet to eject; can accurately collect blood by ensuring linear motion; and can reduce the pain involved in blood collection.