Permanent Magnet Lancing Device Eliminates Skin Puncture Oscillation

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing lancing devices using coil springs cause discomfort due to oscillation and multiple punctures, and are difficult to assemble and handle.

Innovation Solution

A lancing device with a plunger and movable element using magnetic attracting and repelling objects to control the lancet's movement, eliminating the need for coil springs by using a permanent magnet and rotating or sliding components to move the lancet into and out of the skin.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Force

If coil springs are used to produce lancing force, then the lancet can pierce the skin, but oscillation causes multiple punctures and increased discomfort

Engineering Contradiction:

Improvelancing forceVSAvoidmultiple punctures and discomfort

Core Design Contradiction:

ForceVSObject-affected harmful factors

Solution Approach 1:

The patent replaces the coil spring mechanical system with a magnetic field system. A permanent magnet in the plunger interacts with magnetic attracting and repelling objects in the movable element to produce the lancing force, eliminating the oscillatory nature of mechanical springs while maintaining the required piercing capability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces magnetic fields as an intermediary between the plunger and the movable element. The magnetic attracting and repelling objects mediate the force transmission, allowing controlled movement without direct mechanical contact that causes oscillation.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Force

If coil springs are used to produce lancing force, then the lancet can be actuated, but assembly and handling become difficult

Engineering Contradiction:

Improvelancing forceVSAvoidassembly and handling

Core Design Contradiction:

ForceVSEase of manufacture

Solution Approach 1:

The patent replaces coil springs with a magnetic field-based actuation system. The permanent magnet and magnetic objects can be easily positioned and secured without complex mechanical assembly, significantly simplifying manufacturing and handling processes.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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

Reduces or eliminates multiple punctures and discomfort by providing precise, controlled lancet movement, simplifying assembly and handling, and reducing mechanical stress on the user.

Implementation Method 1

The attracting object comes in close proximity to the permanent magnet so as to attract the permanent magnet and move the plunger into a refracted position

Methodology Applied

Scientific EffectMagnetic attraction: Magnetism

Implementation Method 2

The repelling object comes in close proximity to the permanent magnet to repel the permanent magnet and move the plunger into a lancing position

Methodology Applied

Scientific EffectMagnetic repulsion: Magnetism

Data Source

PatentUS9724032B2Permanent magnet lancing device

Publication Date: 2017.08.08 ASCENSIA DIABETES CARE HLDG AG

AI summary

A lancing device and a method for using the lancing device includes a plunger mechanism having a permanent magnet housed therein. The lancing device includes a movable element having at least one attracting object and at least one repelling object. The attracting object attracts the permanent magnet to move the plunger into a retracted position. The repelling object repels the permanent magnet to move the plunger into a lancing position to pierce the skin of a test subject. The use of the permanent magnet in the plunger mechanism reduces or eliminates multiple punctures due to plunger bounce or oscillation that can occur while a body fluid sample is being drawn.