Collapsible Picnic Table Structure for Stable Portable Seating
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Solution Overview
Problem
Existing picnic tables and benches are often large, heavy, and difficult to move, leading to inefficient use of outdoor space when not in use, and portable alternatives made from lightweight materials are flimsy and unstable, limiting their practicality for dining.
Innovation Solution
A collapsible picnic table set with folding legs and benches, utilizing a base with support bars, pivot locks, and tension beams to enable easy transport and storage, ensuring stability during use and compactness when folded.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If traditional picnic tables are made large and heavy for stability, then stability is improved, but portability deteriorates
Solution Approach 1:
The picnic table is divided into separate components: a tabletop and four individual leg assemblies. Each leg assembly can be independently folded against the tabletop, allowing the table to be disassembled into manageable sections for easy transport while maintaining stability when assembled through the interlocking leg structure with support bars and tension beams.
Solution Approach 2:
The leg assemblies incorporate hinges that allow the legs to transition between extended and folded positions. This dynamic mechanism enables the table to change its configuration from a stable, extended dining surface to a compact, portable form factor, resolving the contradiction between stability during use and portability during storage.
2Weight of moving object
If portable furniture is made from lightweight materials for easy transport, then portability is improved, but structural strength deteriorates
Solution Approach 1:
The picnic table combines different materials strategically: the tabletop and seat surfaces use weather-resistant materials like plastic or treated wood for durability, while the leg structures use lightweight aluminum or steel tubes. This composite approach allows the furniture to remain portable while achieving sufficient structural strength for outdoor dining.
Solution Approach 2:
The leg assemblies incorporate curved support bars and tension beams that form triangular and trapezoidal geometric patterns. These curved and angular structural elements distribute loads more effectively than straight lines, enhancing the structural strength of lightweight materials without adding excessive weight.
3Duration of action of stationary object
If picnic tables are left outside year-round for continuous access, then availability is improved, but space utilization deteriorates
Solution Approach 1:
The collapsible design allows the picnic table to transition from an extended operational state to a folded storage state. Users can leave the table assembled for continuous availability during dining seasons, then fold and store it in a garage or shed during off-seasons, maximizing space utilization while maintaining availability when needed.
Solution Approach 2:
The leg assemblies fold nested against the tabletop, with each leg containing support bars and tension beams that collapse into compact configurations. This nesting capability allows the entire table to be reduced to a fraction of its operational footprint for storage, resolving the contradiction between continuous availability and space efficiency.
Data Source
AI summary
A collapsible picnic table set comprising a tabletop, where the tabletop rests atop a base. The base includes at least two pairs of legs, where each pair of legs includes a support bar; a pivot lock attached beneath the tabletop; and a tension beam attached to the support bar at one end and to the pivot lock at an opposing end. The picnic table includes a pair of collapsible benches, where each of the pair of collapsible benches includes; a seat; at least two pairs of bench legs; at least one support bar connecting the pair of bench legs to each other; a pivot lock fastened beneath the seat; and a bench tension beam attached to the support bar and the pivot lock. The legs of both the picnic table and the benches fold against the tabletop and the seat, respectfully to create a compact structure when not in use.