Modular Seating Frame With Hidden Clamping for Easy Cushion Replacement
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Solution Overview
Problem
Seating furniture in public spaces, such as armchairs or benches, face high maintenance and material costs due to frequent damage and the need for quick cleaning and replacement, with existing anchoring methods being costly and aesthetically unappealing.
Innovation Solution
A seating furniture design featuring a standardized frame with separately exchangeable seat and back parts, where these parts are pressed onto working bars with a fitted connection to prevent shifting, using a T-shaped cross-section frame with a web for structural reinforcement and hidden fasteners for secure bracing without visible screws.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If seat and back parts are pressed onto working bars with a fitted connection, then seating comfort and stability are improved, but the complexity of the frame structure increases
Solution Approach 1:
The seat and back parts are segmented from the frame structure, allowing them to be pressed onto working bars with fitted connections. This segmentation enables independent replacement of upholstery parts while maintaining a standardized frame, improving seating comfort and stability without requiring complete frame replacement.
Solution Approach 2:
The seat and back parts are nested onto the working bars through pressed-on fitted connections. This nesting arrangement allows the upholstery components to be securely attached to the frame structure while maintaining ease of assembly and disassembly, resolving the contradiction between stability and structural complexity.
2Ease of repair
If separate seat and back cushions are used with removable cover panels, then ease of repair is improved, but the anchoring cost increases
Solution Approach 1:
The cover panels are extracted as separate removable components from the cushion assembly. This extraction allows the cover panels to be easily removed and replaced without replacing the entire cushion or using costly anchoring materials, while still providing secure attachment through the pressed-on fitted connection system.
Solution Approach 2:
The cover panels are designed as inexpensive, easily replaceable components that can be quickly swapped out when worn or damaged. This approach replaces costly permanent anchoring solutions with affordable, disposable-style cover panels that simplify repair processes.
3Ease of manufacture
If a standardized frame is used to minimize individual components, then manufacturing efficiency is improved, but adaptability to different seat configurations decreases
Solution Approach 1:
The standardized frame is designed with universal working bars and fitted connection interfaces that can accommodate different seat and back part configurations. This universality allows the same frame structure to be used across multiple seat types and arrangements, maintaining manufacturing efficiency while providing configuration flexibility.
Solution Approach 2:
The frame system incorporates dynamic adaptability through its pressed-on fitted connection mechanism, which allows for easy adjustment and reconfiguration of seat and back parts. This dynamic design enables the standardized frame to adapt to different seating arrangements without requiring custom manufacturing, resolving the contradiction between standardization and versatility.
Data Source
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Figure 1b
Figure 1c
AI summary
The invention relates to seating furniture comprising two frames arranged at a distance to each other on a support, between which frames a seat part and a backrest part can be mounted, and the frames have one upper frame part and a lower frame part each which mechanically immobilize the seat part and the backrest part on the edges thereof. The upper frame part and the lower frame part are clamping elements that can be braced with each other and that form matching parts which can be aligned relative each other due to a fitting portion. At least one clamping element has a laterally extending recess on each edge which recess has effective surfaces for static friction and forms a pressure collar for a molded piece provided on a lateral edge of the seat part and the backrest part.