Folding chair support frame

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Solution Overview

Problem

Conventional folding chairs require significant storage space after folding and have stability issues during use due to their design.

Innovation Solution

A folding chair support frame with an upper and lower support frame, where the upper connection rods rotate downward for storage, reducing space occupancy and providing stability through a lower support frame with multiple pressure points and a sleeve for synchronous movement.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If conventional folding chairs use multiple hinge-connected connection rods, then the chair can be folded for portability, but a lot of storage space is still required after folding

Engineering Contradiction:

Improvefolding capabilityVSAvoidstorage space

Core Design Contradiction:

Adaptability or versatilityVSVolume of moving object

Solution Approach 1:

The upper connection rods are nested within the intervals between lower connection positions during folding, with free ends of upper and lower connection rods located on the same side of the lower connection component, achieving compact nesting that significantly reduces storage volume

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

Instead of folding the upper support frame upward as in conventional designs, this patent rotates the upper connection rods downward into the intervals between lower connection positions, inverting the folding direction to achieve more compact storage

Inventive Principle:

Principle #13The other way round (Inversion)

2Device complexity

If conventional folding chairs use simple hinge connections, then the structure is simple, but the chair has poor stability during use

Engineering Contradiction:

Improveconnection structureVSAvoidchair stability

Core Design Contradiction:

Device complexityVSStability of the object's composition

Solution Approach 1:

The lower connection rods are rotatably connected to the lower connection component at a limited angle, allowing dynamic adjustment while maintaining structural stability during use, with the rotation angle limited to prevent excessive movement

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The support frame is divided into upper and lower support frames with multiple connection positions, where the lower connection component has at least three lower connection positions that can independently support weight, distributing pressure and enhancing overall stability

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS11737564B2Folding chair support frame

Publication Date: 2023.08.29 HONG ZHIYUN

AI summary

A folding chair support frame is provided, including an upper support frame detachably connected to a chair surface, and a lower support frame connected to the upper support frame. The upper support frame includes an upper connection component, and upper connection rods rotatably connected to the upper connection component. The lower support frame includes a lower connection component, and lower connection rods rotatably connected to the lower connection component at a limited angle. The lower connection component is coaxially and rotatably connected to the upper connection component. Free ends of the upper connecting rods and free ends of the lower connecting rods are located on a same side of the lower connection component when the folding chair support frame is in a folded state.