Eyeglass Nose Pad Composite Elastomer Resin Design

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Solution Overview

Problem

Conventional nose pads for eyeglasses often cause imprints and pain due to inadequate adaptation to the nose shape, and may slip down or detach unintentionally, failing to effectively disperse pressure and prevent makeup removal.

Innovation Solution

A nose pad with a base portion made of elastomer material and attachment portions made of harder resin material, featuring curved convex surfaces and fine embossing, which increases contact area, adapts to the nose shape, and is securely attached to the eyeglasses to prevent slipping and detachment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If the nose pad is made of soft elastomer material to increase contact area and disperse pressure, then comfort is improved, but the pad may detach unintentionally from the eyeglasses

Engineering Contradiction:

Improveimprint and painVSAvoidattachment stability

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The nose pad combines soft elastomer material for the contact surface with harder resin material for the attachment portion. This composite structure allows the contact surface to disperse pressure comfortably while the harder attachment portion provides reliable bonding to the eyeglass frame, preventing unintentional detachment.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

Different regions of the nose pad have different material properties: the base portion contacting the nose is made of soft elastomer for comfort, while the attachment portion is made of harder resin for secure bonding. This local differentiation resolves the contradiction between comfort and attachment stability.

Inventive Principle:

Principle #3Local quality

2Ease of manufacture

If the nose pad surface is made flat to simplify manufacturing, then ease of manufacture is improved, but the pad does not adapt well to the concave shape of the nose

Engineering Contradiction:

Improvepad surface fabricationVSAvoidnose shape adaptation

Core Design Contradiction:

Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The nose pad surface is designed with a gentle convex curvature that complements the concave shape of the nose. This curved surface adapts well to the nose geometry, improving comfort and contact area without requiring complex manufacturing processes.

Inventive Principle:

Principle #14Spheroidality (Curvature)

3Reliability

If the nose pad is made large to increase contact area and prevent slipping, then stability is improved, but the pad structure becomes more complex

Engineering Contradiction:

Improveslip resistanceVSAvoidpad structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The gentle convex curvature of the nose pad surface increases the effective contact area with the nose without requiring a larger overall pad size. This geometric solution improves slip resistance while maintaining a simple, compact structure.

Inventive Principle:

Principle #14Spheroidality (Curvature)

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

The nose pad effectively reduces imprints and pain by dispersing pressure, prevents slipping, and minimizes makeup removal by increasing the contact area and forming a gap between the pad and nose, while ensuring secure attachment and comfort.

Implementation Method 1

a base portion (32) that is formed of an elastomer material and includes two contact surfaces (38a) coming into contact with the nose

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 2

the convex surface is provided with fine concavo-convex or linear embossing processing to increase an area of contact with the skin of the nose

Methodology Applied

Scientific EffectSurface geometry: Geometry

Data Source

PatentUS10809544B2Nose pad and eyeglasses provided with the pad

Publication Date: 2020.10.20 ACP JAPAN CO LTD

AI summary

The present invention is to provide a nose pad capable of reducing an imprint after wearing eyeglasses and pain in wearing and preventing the eyeglasses from slipping down, without dropping off from the eyeglasses, a nose pad attached to eyeglasses to come into contact with the nose so as to support the eyeglasses is provided with a base portion that is formed of an elastomer material and that includes surfaces of the pad contacting the opposed nose to come into contact therewith, attachment portions that are formed of a resin material and that are provided at opposite end portions of the backside of the surfaces of the base portion to attach to pad arms extending from the eyeglasses, and bump portions that are formed of an elastomer material and that are provided at opposite end portions of the other surface of the base portion to rise.