Blind Spot Mirror Thickness Reduction via Flame-Retardant Adhesive

Solution Overview

Problem

Conventional blind spot mirrors for vehicles, which incorporate flame resistance, are thick and protruding, impairing appearance, causing damage, and hindering weight reduction due to a three-layer structure including a metal thin plate for flame resistance.

Innovation Solution

A single double-sided adhesive tape with a flame-retardant blended resin is attached to the back surface of a planar Fresnel mirror, replacing the metal thin plate, allowing for significant thickness reduction and improved flexibility.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a metal thin plate is attached to the back surface of the Fresnel mirror to impart flame resistance, then flame resistance is achieved, but the mirror becomes thick and protruding

Engineering Contradiction:

Improveflame resistanceVSAvoidthickness of mirror

Core Design Contradiction:

ReliabilityVSLength of stationary object

Solution Approach 1:

The invention merges the flame resistance function with the adhesive tape by incorporating flame retardant into the base sheet material. This combines multiple functions (adhesion and flame resistance) into a single component, eliminating the need for a separate metal thin plate and reducing overall mirror thickness

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The invention uses composite materials by blending flame retardant into the resin base sheet of the adhesive tape. This creates a composite material that simultaneously provides structural support, adhesion, and flame resistance properties without requiring additional metal layers

Inventive Principle:

Principle #40Composite materials

2Reliability

If a metal thin plate with double-sided adhesive tape is used to impart flame resistance, then flame resistance is achieved, but the mirror structure becomes complex and heavy

Engineering Contradiction:

Improveflame resistanceVSAvoidstructure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The invention merges the flame resistance function with the adhesive tape by incorporating flame retardant into the base sheet material. This combines multiple functions (adhesion and flame resistance) into a single component, eliminating the need for a separate metal thin plate and reducing overall mirror thickness

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The adhesive tape base sheet serves multiple functions: it provides adhesion to attach the mirror, provides structural support, and provides flame resistance through the blended flame retardant. This multi-functionality simplifies the overall structure by eliminating dedicated flame resistance components

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Reliability

If a metal thin plate is attached to the back surface for flame resistance, then flame resistance is achieved, but the mirror is prone to damage from baggage

Engineering Contradiction:

Improveflame resistanceVSAvoiddamage resistance

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The invention uses composite materials by blending flame retardant into the resin base sheet of the adhesive tape. This creates a composite material that simultaneously provides structural support, adhesion, and flame resistance properties without requiring additional metal layers

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The invention changes the material parameters by using resin-based composite material instead of metal thin plate. This parameter change provides sufficient strength and flexibility to resist damage from baggage while maintaining flame resistance through the flame retardant additive

Inventive Principle:

Principle #35Parameter changes

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 solution achieves a 50% or more reduction in thickness, leading to weight reduction and improved attachment to curved surfaces, while maintaining flame resistance and preventing damage from baggage.

Implementation Method 1

the base sheet is formed of a resin into which a flame retardant is blended

Methodology Applied

Scientific EffectFlame retardancy:

Implementation Method 2

a single double-sided adhesive tape in which both surfaces of a base sheet are coated with adhesives is attached to a back surface of a Fresnel mirror

Methodology Applied

Scientific EffectAdhesion: Adhesive

Data Source

PatentUS9481302B2Mirror for checking blind spot

Publication Date: 2016.11.01 KOMY

AI summary

Provided is a mirror for checking blind spot that achieves further thickness reduction while being provided with flame resistance.A single double-sided adhesive tape 2 in which both surfaces of a base sheet 7 are coated with adhesives 8, 9 is attached to a back surface of a Fresnel mirror 1 formed of a planar transparent resin plate 3. The base sheet 7 is formed of a resin into which a flame retardant is blended.