Table
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Solution Overview
Problem
Conventional tables with large tabletops made from wood or metal are heavy, expensive, and difficult to move due to their weight, and those made from lightweight materials often require additional structural parts that increase weight and manufacturing costs, posing safety risks and complexity.
Innovation Solution
A tabletop constructed from molded plastic with an integrally formed lip and inwardly extending portions that enhance strength and structural integrity, allowing for a unitary, one-piece structure that can be blow-molded, reducing weight and complexity while maintaining rigidity and aesthetics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If tabletops are constructed from lightweight materials such as plastic, then the weight of the table is decreased, but the tabletop requires large reinforcing members or additional structural parts that increase weight and complexity
Solution Approach 1:
The patent combines the tabletop surface and reinforcing structural elements into a single integrated molded plastic component. The reinforcing ribs and structural features are formed directly as part of the tabletop molding process, eliminating the need for separate reinforcing members, brackets, or support parts that would otherwise be required.
Solution Approach 2:
The molded plastic tabletop serves multiple functions simultaneously: it provides the primary surface structure, incorporates reinforcing ribs for structural integrity, includes attachment features for legs and aprons, and integrates aesthetic elements. This multi-functionality eliminates the need for separate specialized components.
2Strength
If additional reinforcing members and structural parts are added to lightweight tabletops, then the strength of the tabletop is increased, but the weight and manufacturing cost increase
Solution Approach 1:
The reinforcing ribs and structural strengthening elements are integrated directly into the molded plastic tabletop itself, forming a unified structure. This eliminates the need for separate metal or wood reinforcing members that would add significant weight while providing the necessary structural strength.
Solution Approach 2:
The patent utilizes the molding process to create varying wall thicknesses, rib configurations, and structural densities within the plastic tabletop. By optimizing these parameters during molding, the tabletop achieves maximum strength-to-weight ratio without requiring additional heavy materials.
3Reliability
If additional parts and fasteners are used to assemble the table, then the strength and stability are improved, but the manufacturing time and labor cost increase
Solution Approach 1:
The tabletop is molded as a single integrated piece that includes all structural reinforcements, attachment points, and structural features built-in. This eliminates the need for multiple separate parts that would require assembly with fasteners, significantly reducing manufacturing steps and labor requirements.
Solution Approach 2:
The molded plastic tabletop inherently provides its own structural support and stability through integrated ribs and design features, eliminating the need for additional bracing or reinforcement parts that would require separate assembly operations.
4Strength
If conventional wood or metal tabletops are used, then the strength and durability are maintained, but the weight and shipping cost increase
Solution Approach 1:
The patent optimizes the plastic material formulation and molding parameters to achieve a tabletop with strength comparable to wood or metal. Through controlled wall thickness, rib configuration, and material properties, the plastic tabletop attains the necessary structural performance while maintaining significantly lower weight.
Solution Approach 2:
The patent utilizes reinforced plastic materials or composite plastic formulations that enhance the inherent strength and durability of the tabletop. These engineered plastic composites provide mechanical properties approaching those of traditional wood or metal while retaining the weight advantages of plastic.
Data Source
AI summary
A molded plastic structure may comprise a tabletop with an upper surface and a lower surface. A lip may extend downwardly relative to the lower surface of the tabletop, and the lip may include an outer surface and an inner surface. An inwardly extending portion may extend inwardly from the inner surface of the lip. A frame may be connected to the tabletop and the frame may include a side rail of a frame. The side rail may include a receiving portion that receives the inwardly extending portion. The side rail may also include a portion that supports the lower surface of the tabletop and a portion that supports the lip.