Needle Guide Channel Structure for Precise Skin Puncture Motion

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Solution Overview

Problem

Existing skin piercing devices lack effective guidance for the piercing needle, which can lead to inefficiencies in fluid delivery and needle movement.

Innovation Solution

A needle guide device is introduced, featuring a base body with a needle channel that includes proximal and distal wall sections to guide the piercing needle, allowing for precise movement and fluid transport, and can be integrated into a modular skin piercing device.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If a needle guide device with proximal and distal wall sections is implemented, then needle guidance precision is improved, but device complexity increases

Engineering Contradiction:

Improveneedle guidance precisionVSAvoiddevice complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The needle channel is segmented into proximal wall sections and distal wall sections, creating distinct functional zones for needle guidance. This segmentation allows precise control of needle movement in different regions while maintaining a relatively simple overall structure.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Instead of guiding the needle from the distal end only, the invention provides guidance from both proximal and distal ends simultaneously. This inverted approach to traditional needle guidance creates more precise control without requiring complex external guidance mechanisms.

Inventive Principle:

Principle #13The other way round (Inversion)

2Productivity

If the needle channel includes both proximal and distal wall sections, then fluid delivery efficiency is improved, but manufacturing complexity increases

Engineering Contradiction:

Improvefluid delivery efficiencyVSAvoidmanufacturing complexity

Core Design Contradiction:

ProductivityVSEase of manufacture

Solution Approach 1:

The needle channel is divided into proximal and distal wall sections that can be manufactured separately and then assembled. This segmentation enables each section to be optimized for its specific function while simplifying the manufacturing process for each individual component.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The proximal and distal wall sections are designed to fit together within the needle channel structure, with one section nested within or alongside the other. This nesting approach allows complex fluid delivery functionality to be achieved through compact, integrated manufacturing.

Inventive Principle:

Principle #7Nested doll (Nesting)

Data Source

PatentEP3415193B1Needle guide for a skin puncturing device and skin puncturing device

Publication Date: 2025.12.10 MT DERM

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AI summary

The disclosure relates to a needle guide device for a skin piercing device comprising a base body, a skin piercing needle (3), and a needle channel (14) formed in the base body in which the skin piercing needle (3) is arranged, wherein the skin piercing needle (3) is repetitively movable back and forth along a path of movement in the needle channel (14), wherein a channel wall (17) of the needle channel (14) has, along the path of movement with respect to the skin piercing needle (3), proximal guide wall sections (18) against which the skin piercing needle (3) comes into contact during the back-and-forth movement for needle guidance, and distal wall sections (19) which are set back relative to the proximal guide wall sections (18) and are free from contact with the skin piercing needle (3) during the back-and-forth movement of the skin piercing needle (3) in the needle channel (14). Furthermore, a skin piercing device is provided. (Fig. 4)