Eyeglass Nose Pad with Elastomer Bumps and Resin Attachment

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Solution Overview

Problem

Conventional nose pads for eyeglasses often cause discomfort and imprint due to inadequate adaptation to the nose shape, and may peel off unintentionally, failing to effectively prevent slipping and makeup removal.

Innovation Solution

A nose pad with a base portion made of elastomer material and attachment portions of harder resin material, featuring curved convex bump portions that increase contact area and adaptability to the nose shape, preventing peeling and enhancing durability and comfort.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If the nose pad is formed of soft materials to alleviate pain and prevent slipping, then comfort is improved, but the pad may peel off unintentionally and drop off

Engineering Contradiction:

Improvepain and discomfortVSAvoidattachment stability

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The nose pad combines soft elastomer material for comfort with harder resin material for attachment portions, creating a composite structure that prevents both pain and peeling. The soft base portion contacts the nose to prevent pain, while the harder attachment portions securely fasten to the pad arm.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

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

Inventive Principle:

Principle #3Local quality

2Object-affected harmful factors

If the nose pad has a large contact area to disperse pressure, then imprint and pain are alleviated, but the pad is not matched with the shape of the nose surface

Engineering Contradiction:

Improveimprint and painVSAvoidshape matching

Core Design Contradiction:

Object-affected harmful factorsVSAdaptability or versatility

Solution Approach 1:

The bump portions are formed with curved convex surfaces that adapt to the gentle concave shape of the nose side face. This curvature enables the pad to match the nose surface contour while maintaining adequate contact area to disperse pressure and prevent imprint.

Inventive Principle:

Principle #14Spheroidality (Curvature)

3Ease of manufacture

If the nose pad has a planar surface to simplify manufacturing, then manufacturing is easier, but the side edge portion digs into the nose and causes imprint and pain

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoidimprint and pain

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The bump portions with curved convex surfaces replace the planar surface design. This curvature prevents the side edge portion from digging into the nose, eliminating imprint and pain while remaining manufacturable through standard molding processes.

Inventive Principle:

Principle #14Spheroidality (Curvature)

4Reliability

If the pad is bonded to the nose pad portion to prevent dropping, then attachment is improved, but the pad may peel off unintentionally

Engineering Contradiction:

Improveattachment stabilityVSAvoidbond integrity

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The nose pad is segmented into a base portion and separate attachment portions. The attachment portions are designed to fit into grooves on the pad arm, creating a mechanical interlock that prevents both dropping and peeling, unlike simple bonding methods.

Inventive Principle:

Principle #1Segmentation

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 discomfort and imprint, prevents slipping, and maintains secure attachment to the eyeglasses while adapting to the nose shape, reducing makeup removal and skin humidity.

Implementation Method 1

a base portion 32 that is formed of an elastomer material

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 2

bump portions 36 that are formed of an elastomer material and that are provided at opposite end portions of the other main surface of the base portion 32 to rise

Methodology Applied

Scientific EffectPressure distribution: Pressure Gradient

Data Source

PatentUS10495899B2Nose pad and eyeglasses provided with the pad

Publication Date: 2019.12.03 ACP JAPAN CO LTD

AI summary

A nose pad reduces an imprint after wearing eyeglasses and pain in wearing. The nose pad is attached to eyeglasses and comes into contact with the nose to support the eyeglasses, and includes a base portion formed of an elastomer material and having two opposed main surfaces, attachment portions formed of a resin material and provided at opposite end portions of one of the main surfaces of the base portion to attach to pad arms extending from the eyeglasses, and bump portions formed of an elastomer material and provided at opposite end portions of the other main surface of the base portion to rise. Each of the bump portions includes a curved convex surface, and the resin material of the attachment portions is harder than the elastomer material of the base portion and the elastomer material of the bump portions.