Centrally Positioned Lancing Device Outlet for Precise Blood Sampling
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Solution Overview
Problem
Users, especially the elderly, face difficulties in precisely positioning the lancet outlet opening in existing lancing devices due to its off-centre arrangement, leading to painful procedures and increased handling complexity, with solutions like centralizing the outlet or changing the lancet arrangement resulting in larger devices or reduced lancet capacity.
Innovation Solution
A lancing device with a centrally arranged outlet opening and a lancet magazine that allows lancets to move in a plane perpendicular to the longitudinal axis, featuring a guidance path that simplifies positioning and includes a drive device for precise needle movement, a removable cap for protection, and a clock device to ensure single-use lancets, reducing the risk of infection and improving user comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the outlet opening is arranged off-centre in existing lancing devices, then the magazine drum can be compactly arranged, but the user cannot easily position the lancet tip at the desired site, leading to painful procedures
Solution Approach 1:
The patent applies asymmetry by deliberately placing the outlet opening off-centre relative to the magazine drum's rotational axis. This asymmetric arrangement allows the magazine drum to be compactly designed while the base body provides the central reference point for positioning. The outlet opening is positioned at a specific offset distance from the centre of the positioning face, creating an asymmetric configuration that resolves the contradiction between compact magazine design and ease of positioning.
2Ease of operation
If the outlet opening is moved to the centre of the positioning face, then positioning becomes simple for the user, but the magazine drum requires larger constructional space or reduced lancet capacity
Solution Approach 1:
The patent segments the positioning function from the magazine drum function. The base body contains the central positioning reference and outlet opening, while the magazine drum is a separate component that rotates around the longitudinal axis. This segmentation allows the outlet opening to be centrally positioned on the positioning face for easy user positioning, while the magazine drum maintains its compact off-centre arrangement for efficient space utilization and maximum lancet capacity.
3Ease of operation
If the magazine drum is made larger to accommodate central outlet arrangement, then the device becomes more unwieldy, but the outlet opening can be centrally positioned
Solution Approach 1:
The patent transitions from a two-dimensional planar arrangement to a three-dimensional configuration by positioning the outlet opening on the positioning face that extends perpendicular to the longitudinal axis. The magazine drum rotates around this axis, creating a three-dimensional arrangement where the outlet opening appears central on the positioning face while the magazine drum maintains its compact off-centre volume. This dimensional change resolves the contradiction between central positioning and compact device size.
Data Source
AI summary
The application relates to a lancing device for obtaining samples of body fluid, said device comprising: a base body which is rotationally symmetrical with relation to the longitudinal axis thereof and on one longitudinal end of which a positioning surface with an exit opening is arranged; a lancet cartridge for receiving a plurality of lancets; a drive device for moving a lancet held in the lancet cartridge back and forth along the longitudinal axis; and a transport device for transporting lancets on a plane perpendicular to the longitudinal axis. The exit opening is located substantially centrally in the positioning surface and the lancet cartridge has a guide track for the lancets, in which track said lancets can be positioned in such a way that their tips can emerge from the exit opening during the movement back and forth.