Push Button Frame Assembly Interference Fit Fixing

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Solution Overview

Problem

Existing frame assemblies for electronic devices with push buttons face damage during the melting process of posts used for fixing the button member, complicating attachment and increasing costs.

Innovation Solution

A frame assembly design featuring a bottom wall with through holes and posts, where each post is interferentially engaged with a fixing hole on a fixing board using elastic connectors, and the fixing holes have protuberances for secure attachment without melting, allowing for easy detachment and replacement.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If posts are melted to fix the button member on the frame, then the button member can be securely attached, but damage may occur to the button member or nearby devices during the melting process

Engineering Contradiction:

Improveattachment strengthVSAvoiddamage to button member or nearby devices

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

The patent replaces the thermal melting process with a mechanical interference fit system. Posts with enlarged heads are inserted into corresponding holes in the fixing board, creating a secure mechanical connection without applying heat that could damage surrounding components. This substitution eliminates the harmful thermal effects while maintaining strong attachment.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If posts are melted to attach the button member, then fixation is achieved, but the process becomes complex and costly

Engineering Contradiction:

Improvefixation reliabilityVSAvoidattachment process complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The fixing system is segmented into distinct components: posts with enlarged heads on the frame, corresponding holes in the fixing board, and elastic connectors. This segmentation allows for simple, modular assembly where each component has a specific function, reducing overall system complexity while ensuring reliable fixation through the interference fit mechanism.

Inventive Principle:

Principle #1Segmentation

3Strength

If posts are melted to fix the button member, then attachment is secure, but detachment and replacement become difficult

Engineering Contradiction:

Improveattachment strengthVSAvoiddetachment and replacement ease

Core Design Contradiction:

StrengthVSEase of repair

Solution Approach 1:

The fixing system incorporates elastic connectors that provide dynamic, reversible attachment. These elastic elements allow the button member to be securely fixed during operation while enabling easy detachment and replacement when needed. The elasticity provides both strong holding force and controlled release capability, facilitating maintenance and repairs.

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

This design ensures secure and easy attachment of push buttons to the frame assembly, reducing the risk of damage and simplifying the attachment process while enabling cost-effective maintenance by allowing the fixing board to be replaced independently.

Implementation Method 1

the push buttons 122 can automatic bounce back via resilience of the connectors 121 after pressing

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 2

Each post is interferentially engaged in a corresponding fixing hole

Methodology Applied

Scientific EffectInterference fit: Mechanical Fastener

Data Source

PatentUS7335842B2Housing device with fixing member for push button

Publication Date: 2008.02.26 INNOLUX CORP

AI summary

An exemplary frame assembly (2) includes a frame (21), plural posts (212), a button member (22), and plural push buttons (222). The frame includes a bottom wall (211). The posts are formed at the bottom wall. The button member includes a fixing board (223) having plural fixing holes (225). Plural protuberances (2252) are formed on an inner wall surrounding each fixing hole. Each push button connects to the fixing board by an elastic connector (221). Each post is interferentially engaged in a corresponding fixing hole.