Needle Roller Device Tip Extraction for Skin Injection

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Solution Overview

Problem

Existing needle roller devices for skin injection face challenges such as skin damage, ineffective needle insertion, and drug application issues due to needle damage or improper spacing.

Innovation Solution

A needle roller device with a main body, a roller part, and a rotation connection part, featuring fine needles coupled to needle protrusions on the roller, allowing for precise skin penetration and drug application without damaging the needles.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If fine needles are radially formed on the outer surface of a cylindrical roller in gear form, then micropores can be formed in the skin, but the outer surface of the roller rubs against the skin making it difficult to insert needles effectively and causing skin damage

Engineering Contradiction:

Improveneedle insertion effectivenessVSAvoidskin damage

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The fine needles are extracted from the roller surface and repositioned to protrude from the roller tip only. This separates the needle insertion function from the roller rotation function, allowing the roller to rotate smoothly against the skin while only the tip needles penetrate to form micropores, eliminating rubbing damage.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Instead of having needles distributed across the roller surface, the invention inverts the configuration by concentrating needles only at the roller tip. This reversal of needle placement strategy transforms the mechanism from surface rubbing to precise tip penetration.

Inventive Principle:

Principle #13The other way round (Inversion)

2Productivity

If fine needles are pushed by the roller during rotation, then micropores are formed, but skin damage occurs and scars are left increasing pain and infection risk

Engineering Contradiction:

Improvemicropore formation efficiencyVSAvoidskin damage and infection risk

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The harmful rubbing action is eliminated by extracting the needle function from the roller surface and concentrating it at the tip. Only the tip needles contact and penetrate the skin during rotation, forming micropores without the lateral rubbing that causes damage and scarring.

Inventive Principle:

Principle #2Taking out (Extraction)

3Quantity of substance

If fine needles are spaced far from the drug supply pipe, then drug application may not be effective, but needle damage occurs during the process

Engineering Contradiction:

Improvedrug application effectivenessVSAvoidneedle integrity

Core Design Contradiction:

Quantity of substanceVSReliability

Solution Approach 1:

The drug is preliminarily applied to the roller surface before needle insertion. When the roller rotates and needles protrude from the tip, the drug is already positioned on the roller and transfers to the skin through the micropores formed by needle penetration, ensuring both drug delivery and needle protection.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20250135172A1Needle roller device for skin injection

Publication Date: 2025.05.01 NOBAMEDI CO LTD

AI summary

Provided is a needle roller device for skin injection which includes a main body comprising, formed on one side thereof, an injection pipe part with an injection port to which a drug injection device is detachably coupled, and formed on the other side thereof, an expansion part with predetermined width and length communicating with the injection pipe part, a roller part rotatably coupled to the expansion part, and comprising a plurality of needle protrusions formed on an outer circumferential surface, and fine needles coupled to the plurality of needle protrusions and exposed to outside, and a rotation connection part that fastens the main body and the roller part.