Interlocking Cam Assembly for Easy Recliner Base Connection
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Solution Overview
Problem
Reclining furniture with mechanisms like rockers, gliders, and swivels pose assembly challenges due to the precision required for interlocking parts, which is beyond the capability of average individuals assembling ready-to-assemble furniture.
Innovation Solution
A multi-piece cam assembly system with interlocking cams that facilitates easier assembly and disassembly, suitable for various furniture types, including recliners, rockers, and gliders, utilizing a snap-fit locking arrangement between receiving and locking cams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional interlocking cams are used in reclining furniture, then the connection strength is sufficient, but the assembly precision required is beyond the capability of average individuals
Solution Approach 1:
The cam assembly is divided into multiple separate components: a first cam portion attached to the furniture base and a second cam portion attached to the furniture frame. These segmented parts feature complementary cam profiles that guide each other through defined paths, allowing assembly without requiring high precision while maintaining strong connections through the distributed contact areas of the cam profiles
Solution Approach 2:
The cam profiles act as intermediary elements between the first cam portion and second cam portion. As the cam portions move relative to each other during assembly, the cam profiles guide the motion and transfer force, enabling the components to self-align and connect properly without requiring the assembler to achieve high precision positioning
2Adaptability or versatility
If complex mechanisms like rockers and gliders are integrated into furniture, then the functionality is enhanced, but the assembly difficulty increases significantly
Solution Approach 1:
The complex mechanisms are broken down into modular components that can be separately attached to the furniture base and frame using the cam assembly system. This segmentation allows each component to be independently prepared and then easily connected through the simple cam interlocking action, reducing overall assembly difficulty while maintaining full functionality
Solution Approach 2:
The cam portions are pre-configured with their respective cam profiles and attachment points during manufacturing. This preliminary preparation allows the actual assembly process to be simplified to just the cam interlocking action, enabling consumers to easily assemble complex furniture mechanisms without needing to perform complex alignment or fastening operations
3Device complexity
If unitary cam designs are used, then the structure is simple, but the serviceability and field repair capability are limited
Solution Approach 1:
The cam assembly is designed as separable components that can be independently removed and replaced. If one cam portion becomes damaged or worn, only that specific portion needs to be replaced rather than the entire cam assembly, significantly improving field serviceability while maintaining relatively simple individual component structures
Solution Approach 2:
The cam portions are designed with standardized interfaces and cam profiles that can be used across different furniture mechanisms and configurations. This universality allows the same cam assembly design to serve multiple functions and be applied to various furniture types, simplifying the overall system while enabling easy replacement and repair using the same components
Data Source
AI summary
A mechanism and method for assembling a base to a piece of furniture is provided with at least two cams having complimentary interlock mechanisms constructed and arranged to interlock one to another.