Vehicle Door Handle Escutcheon Tool-Free Detachment Mechanism

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Solution Overview

Problem

Existing vehicle door inside handle devices require tools for detaching the escutcheon member, leading to poor workability and an impaired aesthetic appearance due to exposed cut-out portions.

Innovation Solution

A vehicle door handle device with a frame-shaped escutcheon member that is elastically deformable and connected to the handle base via snap-locking connection portions, allowing for horizontal force application to unlock and detach the escutcheon member without tools, maintaining a clean surface aesthetic.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a driver and cut-out portion are used to detach the escutcheon member, then the connection can be secured, but the workability of detaching operation becomes poor and aesthetic appearance is impaired

Engineering Contradiction:

Improveconnection securityVSAvoiddetaching operation workability

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The escutcheon member is designed to detach itself through elastic deformation when horizontal force is applied. The inclined surface converts the horizontal pulling force into vertical detachment force, eliminating the need for external tools like drivers. The member serves its own detachment function through its elastic properties and geometric design.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

Instead of requiring a tool to insert into a cut-out portion and pull upward directly, the design inverts the mechanism by using an inclined surface that converts horizontal force into vertical detachment force. The detachment action is achieved through the member's elastic deformation rather than direct tool insertion.

Inventive Principle:

Principle #13The other way round (Inversion)

2Reliability

If a driver and cut-out portion are used to detach the escutcheon member, then the connection can be secured, but the aesthetic appearance is impaired due to exposed cut-out portion

Engineering Contradiction:

Improveconnection securityVSAvoidaesthetic appearance

Core Design Contradiction:

ReliabilityVSShape

Solution Approach 1:

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The functional elements (connection and detachment mechanisms) are extracted from the visible surface area. The snap-locking connection portions are integrated into the member structure itself rather than requiring exposed cut-out portions or tool insertion holes on the surface, maintaining a clean aesthetic appearance while preserving connection security.

Inventive Principle:

Principle #2Taking out (Extraction)

3Strength

If multiple connection portions are used to secure the escutcheon member, then the connection strength is improved, but the complexity of detaching operation increases

Engineering Contradiction:

Improveconnection strengthVSAvoiddetaching operation complexity

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The connection system is segmented into multiple independent connection portions distributed around the escutcheon member. Each connection portion operates independently with its own locking and unlocking mechanism. This segmentation allows the member to be securely connected at multiple points while maintaining simple, modular detachment operations at each point.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The connection portions are designed with dynamic characteristics where the escutcheon member can be progressively unlocked by applying horizontal force. The elastic deformation enables the member to dynamically transition from locked to unlocked state across multiple connection portions in sequence, maintaining connection strength during normal use while enabling controlled detachment.

Inventive Principle:

Principle #15Dynamics

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

Enhances the workability of detaching the escutcheon member and improves the aesthetic appearance by eliminating the need for tools and tool insertion openings.

Implementation Method 1

a frame-shaped escutcheon member (3) which is connected to an upper edge portion of the handle base (2) and is elastically deformably formed

Methodology Applied

Scientific EffectElastic deformation: Elasticity

Data Source

PatentUS9045920B2Vehicle door inside handle device

Publication Date: 2015.06.02 ALPHA

AI summary

A vehicle door handle device is provided with a handle base, an escutcheon member, and a plurality of connection portions which connect the handle base and the escutcheon member to each other. The plurality of connecting portions include: a first connecting portion including an inclined surface which causes a motion component force toward a frame exterior to be generated in the escutcheon member by a horizontal operating force applied to the escutcheon member, thereby unlocking the first connecting portion; a second connection portion which is unlocked by deforming the escutcheon member using a moveable region in a vicinity of the first connection portion generated by the unlocking in the first connecting portion; and an n-th connection portion which is unlocked by deforming the escutcheon member using the moveable region due to the unlocking in the preceding connection portions.