Double Folding Chair With Rotating Backrests for Face-to-Face Seating
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Solution Overview
Problem
Existing double folding chairs have seats on the same plane, limiting face-to-face communication and usability for multiple people, resulting in poor user experience.
Innovation Solution
A double folding chair with rotation angles, featuring four backrest pipes, two armrest pipes, and rotation-angle transverse-bracing pipes, along with intermediate connecting pieces that allow the formation of a flare angle between chair backs, enabling convenient communication and accommodating two users.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If two seats are located on the same plane in a double folding chair, then the structure is simple and compact, but users cannot communicate face-to-face conveniently and must lean their bodies or change sitting postures
Solution Approach 1:
The patent applies the dynamics principle by making the chair backs rotatable relative to each other through a hinge connection. The chair backs can be adjusted between a collapsed state (aligned) and an expanded state (angled apart), allowing users to dynamically change the configuration for optimal communication angles while maintaining a compact form when not in use.
Solution Approach 2:
The patent implements another dimension by introducing rotational movement in a third dimension (vertical/angular dimension) rather than only horizontal arrangement. The chair backs can rotate outward from the same plane, creating a flare angle that enables face-to-face communication while maintaining the same-footprint base area.
2Adaptability or versatility
If a double folding chair allows face-to-face communication with flare angles, then user experience is improved, but the structural complexity increases with additional connecting pieces and rotation mechanisms
Solution Approach 1:
The patent applies segmentation by dividing the chair into modular components: two independent seat assemblies, each with its own backrest, armrest, and leg structure. The backrests are further segmented with hinge connections that allow independent rotation, enabling flexible configuration while keeping each module relatively simple and manageable.
Solution Approach 2:
The patent uses an intermediary hinge mechanism that connects the two chair backs, allowing them to rotate relative to each other. This intermediary component enables the complex motion of flare angle adjustment while being a relatively simple mechanical element that can be manufactured and assembled easily.
3Ease of operation
If the chair backs can rotate to form flare angles, then users can communicate conveniently without changing postures, but the manufacturing complexity increases
Solution Approach 1:
The patent merges multiple functions into the hinge connection: it serves as both the structural joint connecting the chair backs to the seat frames and the rotation mechanism enabling flare angle adjustment. This consolidation reduces the number of separate components and simplifies the manufacturing process compared to having separate mounting brackets and rotation mechanisms.
Data Source
AI summary
The invention discloses a double folding chair with rotation angles. The double folding chair comprises four backrest pipes and two armrest pipes, wherein the a wrest pipes and the backrest pipes form a folding chair frame, rotation-angle transverse-bracing pipes are arranged between the two backrest pipes in the middle so that a flare angle can be formed between two chair backs, and intermediate connecting pieces which can rotate coaxially are arranged on a front support of the folding chair frame so as to be matched with the rotation-angle transverse-bracing pipes. Since the flare angle can be formed between two chair bodies, chair users can communicate conveniently, and the double folding chair has the advantages of being reasonable in structure, good in user experience etc.