Frame assembly for folding type chair
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Solution Overview
Problem
Conventional folding type chairs require cumbersome operation of multiple independently hinged supports for folding and unfolding, making them difficult to manage.
Innovation Solution
A frame assembly with upper and lower supports coupled via a hinge shaft and an ascending and descending shaft, allowing for simultaneous folding or unfolding of the chair by associating the supports, with adjustable lengths and integrated coupling mechanisms for ease of use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If multiple supports are independently hinged to the upper and lower blocks, then the chair structure is simple and easy to manufacture, but the folding and unfolding operation becomes cumbersome and complex
Solution Approach 1:
The patent merges multiple independently hinged supports into a single integrated support structure that folds and unfolds as one unit. The support includes multiple segments connected by hinge shafts that allow simultaneous folding/unfolding motion, eliminating the need to operate multiple separate supports individually. This combining approach maintains manufacturing simplicity while dramatically improving operational ease.
Solution Approach 2:
The patent introduces dynamic coupling mechanisms including hinge shafts and coupling holes that enable the support segments to move relative to each other during folding and unfolding. The ascending and descending shafts provide dynamic adjustment capability, allowing the support to transition between folded and unfolded states smoothly. This dynamic design allows the structure to adapt its configuration while maintaining ease of operation.
2Adaptability or versatility
If multiple supports are folded or unfolded individually, then each support can be independently adjusted, but the overall folding process becomes time-consuming and inefficient
Solution Approach 1:
The patent combines multiple support segments into a single operable unit where folding one segment automatically triggers the folding of other segments through the hinge shaft and coupling hole mechanism. This merging eliminates the sequential operation required in conventional designs, reducing the time needed to fold or unfold the chair while maintaining the adaptability to adjust support angles and configurations.
Solution Approach 2:
The patent incorporates preliminary action through the pre-configured hinge shafts and coupling holes that are positioned to enable automatic sequential folding/unfolding. When one support segment is moved, the pre-arranged mechanical connections cause other segments to follow in a predetermined sequence, eliminating the need for manual adjustment of each segment and significantly reducing operation time.
3Strength
If the supports are rigidly fixed to the brackets, then the structure is stable and strong, but the folding and unfolding capability is lost
Solution Approach 1:
The patent replaces rigid fixed connections with dynamic hinge joints and sliding coupling mechanisms. The hinge shafts allow rotational movement between support segments while maintaining structural integrity, and the coupling holes in the brackets provide guided motion paths. This dynamic connection system enables the chair to be folded and unfolded while maintaining sufficient strength to support users when in the unfolded configuration.
Solution Approach 2:
The patent introduces intermediary elements including hinge shafts, coupling holes, and ascending/descending shafts that mediate between the rigid bracket structures and the flexible support segments. These intermediaries transmit forces and motions while allowing controlled movement, enabling the chair to transition between folded and unfolded states without compromising the structural strength of the overall assembly.
Data Source
AI summary
Disclosed is a frame assembly for a folding type chair that are folded or unfolded once by coupling a plurality of upper and lower supports configuring a main frame of a chair to be operatively associated.