Snap-Fit Seat and Frame Assembly for Stable Modular Seating
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Solution Overview
Problem
Existing seat elements, comprising separate frames and seats assembled with rivets, bolts, or screws, are cumbersome for storage and transport, prone to instability due to production tolerances, and suffer from attachment device breakage and abrasion issues, especially when upholstered.
Innovation Solution
A seat element design featuring a tubular metal frame with lateral plates and a seat with tabs, utilizing a flexible snap coupling mechanism, such as a spring with a cantilevered arm, for secure and easy assembly and disassembly without damaging the seat or its covering, ensuring stability and ease of handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If rivets, bolts or screws are used to connect the seat and frame, then the connection is strong and stable, but the assembly requires specialized machines and labor
Solution Approach 1:
The patent replaces the traditional mechanical fastening system (rivets, bolts, screws requiring specialized tools) with a snap-fit coupling system based on elastic deformation. The coupling element utilizes elastic recovery to create a secure connection without requiring riveting machines or specialized assembly labor, thus substituting a complex mechanical fastening system with a simpler elastic-based system.
2Ease of operation
If the seat and frame are pre-assembled, then the product is ready for use, but it becomes cumbersome for storage and transport
Solution Approach 1:
The patent divides the seat element into separable components (seat and frame) connected through a coupling mechanism that allows easy assembly and disassembly. This segmentation enables the product to be stored and transported in a compact, disassembled state while still providing a ready-to-use assembled configuration when needed, resolving the contradiction between readiness and storage efficiency.
3Ease of manufacture
If attachment devices are used to connect separate seat and frame, then assembly is easier, but the attachment devices break and cause abrasion during assembly and dismantling
Solution Approach 1:
The patent changes the physical parameters of the coupling system by using an elastic material with specific recovery properties. The coupling element is designed to deform elastically during assembly and then recover to lock into place, creating a reliable connection that does not break or cause abrasion. This parameter change from rigid mechanical fasteners to elastic deformation-based coupling resolves the reliability issue while maintaining ease of assembly.
4Device complexity
If shaped couplings are used between frame and seat, then assembly is simplified, but production tolerances cause play and instability
Solution Approach 1:
The patent introduces dynamic elasticity into the coupling system, where the coupling element can deform and adapt to slight variations in production tolerances. This dynamic capability allows the coupling to maintain a stable, play-free connection despite dimensional variations, resolving the contradiction between simplified coupling design and structural stability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution allows for practical assembly and disassembly without abrasion, reduces machine and labor requirements, and facilitates easier storage and transport, while maintaining structural integrity and minimizing production costs.
Implementation Method 1
a snap coupling element (32) positioned between the at least one tab (28) and the at least one lateral plate (24), flexible in relation to the plate (24) and to the tab (28)
Data Source
AI summary
A seat element comprising a frame, a seat associable to said frame, wherein the frame and the seat are made separately from each other and can be engaged and disengaged from each other. Advantageously, the frame comprises at least one lateral plate and the seat comprises at least one tab which, in an assembled configuration, couples at least partially onto said lateral plate in a shaped coupling. Between the at least one tab and the at least one plate a snap coupling element is positioned, which is flexible in relation to the plate and to the tab so as to block the seat to the frame in an assembled configuration of the element.