Curvilinear Inner Wall Corner Post for Contoured Appliance Protection

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Solution Overview

Problem

Conventional corner posts are not suited for modern appliances with rounded or contoured shapes, particularly those with significantly curved vertical edges, as they fail to provide adequate impact protection and stacking strength.

Innovation Solution

A tubular corner post with a curvilinear inner wall to match the curved vertical edge of the appliance and a right-angled outer wall to fit the packaging sleeve, featuring a bead for added strength and deformation resistance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If conventional L-shaped corner posts are used, then they provide adequate protection for appliances with sharp corners, but they fail to conform to and protect appliances with curved vertical edges

Engineering Contradiction:
Improveadaptability to different appliance shapesVSAvoidimpact protection effectiveness
Core Design Contradiction:
Adaptability or versatilityVSReliability

Solution Approach 1:

The corner post employs different cross-sectional shapes at different locations: the outer corner maintains a right angle to fit the package sleeve, while the inner corner features a curved profile to conform to the appliance's curved vertical edge. This local differentiation allows the single corner post structure to adapt to both the packaging container and the protected article simultaneously, resolving the contradiction between adaptability and protection effectiveness.

Inventive Principle:
Principle #3Local quality

2Shape

If the inner wall is curved to match the appliance shape, then it provides conformal protection, but it may reduce structural strength and stacking capability

Engineering Contradiction:
Improveconformality to appliance edgeVSAvoidstacking strength
Core Design Contradiction:
ShapeVSStrength

Solution Approach 1:

The corner post is segmented into distinct functional zones: the outer wall maintains rigid right-angled geometry for structural strength and package sleeve fit, while the inner wall adopts a curved profile for appliance conformality. The hollow tubular structure further segments the volume to provide both protection and stacking capability, allowing each segment to optimize its local function without compromising overall strength.

Inventive Principle:
Principle #1Segmentation

3Object-affected harmful factors

If a hollow tubular structure is used, then it provides impact absorption, but it may reduce stacking strength compared to solid structures

Engineering Contradiction:
Improveimpact resistanceVSAvoidstacking strength
Core Design Contradiction:
Object-affected harmful factorsVSStrength

Solution Approach 1:

The corner post utilizes a composite structure combining the hollow tubular form (for impact absorption) with strategically placed beads or ribs (for structural reinforcement). The bead integrally formed in the outer wall creates a composite geometry that maintains the hollow protective volume while adding localized strength to prevent collapsing during impact, thereby resolving the contradiction between impact resistance and stacking strength.

Inventive Principle:
Principle #40Composite materials

Data Source

PatentUS7841469B2Corner post for use with an article having a contoured vertical edge
Publication Date: 2010.11.30 SONOCO DEVELOPMENT INC
  • US7841469B2 patent drawing
  • US7841469B2 patent drawing

AI summary

A corner post (10) for protecting a packaged article (50) having a curved vertical edge is provided. The corner post (10) comprises an outer wall (12) having first and second substantially planar outer wall members (14, 16) joined at a right angle along an outer corner (18), and a curvilinear inner wall (20) that conforms to the shape of the vertical edge.