Formed Metal Sign Cabinet Assembly for Precise Module Alignment

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Solution Overview

Problem

Existing electronic sign construction methods are labor-intensive and time-consuming, relying on extruded components that are not reliably true and straight, making alignment and assembly of components unsatisfactory.

Innovation Solution

The use of precision-formed metal components, such as channels and panels, secured with rivets, nut inserts, and double-sided adhesive coated tape, allows for rapid assembly without drilling, enabling accurate alignment and flush mounting of electronic display modules.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If extruded components are used for cabinet construction, then the structure can be fabricated, but the components are not reliably true and straight, making alignment and assembly unsatisfactory

Engineering Contradiction:
Improvealignment precisionVSAvoidcomponent straightness
Core Design Contradiction:
Manufacturing precisionVSReliability

Solution Approach 1:

The cabinet components are pre-formed with precise dimensions and straight edges before assembly. The precision forming process creates components that are already true and straight, eliminating the need for field alignment and adjustment during assembly.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent replaces traditional mechanical alignment methods (drilling, riveting, welding) with a precision forming process that creates components with built-in alignment features. The formed components mate directly through their precise geometries without requiring mechanical adjustment.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

2Ease of manufacture

If traditional assembly methods (drilling, riveting, welding) are used, then components can be joined, but the process is labor intensive and time consuming

Engineering Contradiction:
Improveassembly simplicityVSAvoidassembly speed
Core Design Contradiction:
Ease of manufactureVSProductivity

Solution Approach 1:

Alignment holes and fastener locations are pre-formed during the precision forming process. This preliminary action eliminates the need for field drilling and alignment, allowing components to be quickly assembled by simply inserting fasteners into the pre-formed holes.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The cabinet is divided into modular formed components that can be independently manufactured and then quickly assembled. The segmentation into standardformed pieces allows for parallel manufacturing and rapid assembly without complex joinery.

Inventive Principle:
Principle #1Segmentation

3Reliability

If extruded components are used, then the cabinet can be constructed, but the components do not mate reliably, requiring additional alignment techniques

Engineering Contradiction:
Improvecomponent matingVSAvoidassembly process complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent replaces complex mechanical alignment systems with precision-formed components that have built-in mating features. The formed components include precise edges, corners, and surfaces that naturally align with each other, eliminating the need for additional alignment techniques.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

All cabinet components are formed using the same precision forming process, ensuring uniform tolerances and consistent mating characteristics across all parts. This homogeneity in manufacturing quality ensures reliable mating without requiring different alignment methods for different components.

Inventive Principle:
Principle #33Homogeneity

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 approach simplifies the assembly process, ensures precise alignment, and facilitates the rapid construction of electronic signs with a formed metal cabinet, reducing labor and time while maintaining geometric uniformity and conformity.

Implementation Method 1

A double-sided adhesive coated tape is used to secure and seal the formed top, bottom, and end panels to the appropriate formed channels and formed mid-channels

Methodology Applied
Scientific EffectAdhesive bonding: Adhesive

Data Source

PatentUS20090021127A1Electronic sign having a formed metal cabinet
Publication Date: 2009.01.22 DAKTRONICS INC
  • US20090021127A1 patent drawing
  • US20090021127A1 patent drawing
  • US20090021127A1 patent drawing

AI summary

An electronic sign having a formed metal cabinet where precise and close tolerance formed planar panels and formed channels are fastened together only by rivets, nut inserts or the combination thereof for rapid assembly thereof.