Four-Bar Linkage Seating Arrangement for Reduced Movement Complexity
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Solution Overview
Problem
Conventional seating arrangements often lack a seamless integration of flexibility and support, leading to inefficient movement mechanisms and increased complexity in design, which can result in higher manufacturing and labor costs.
Innovation Solution
A seating arrangement utilizing a four-bar linkage mechanism composed of flexibly resilient and rigid link members, along with a separate back assembly, allows for smooth movement between upright and reclined positions while maintaining a stationary support member and armrest, reducing part counts and manufacturing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional seating arrangements use separate complex movement mechanisms for seat and back, then flexibility and support can be provided, but device complexity and manufacturing costs increase
Solution Approach 1:
The patent combines the seat support and back support into a single integrated four-bar linkage mechanism. The first and second link members form a unified structure where the first link member supports the seat and the second link member supports the back, allowing both to move together through a single control input rather than requiring separate mechanisms.
Solution Approach 2:
The four-bar linkage mechanism serves multiple functions simultaneously: it provides seat support, back support, coordinated movement between seat and back, and structural stability. This multi-functional design eliminates the need for separate mechanisms for each function, reducing overall device complexity.
2Adaptability or versatility
If conventional seating arrangements use multiple separate components for support structures, then flexibility can be achieved, but manufacturing and labor costs increase
Solution Approach 1:
The patent merges multiple support functions into the integrated four-bar linkage structure. The first link member, second link member, and their connection points form a unified assembly that can be manufactured as a single component or pre-assembled unit, reducing the number of separate parts that need to be manufactured and assembled.
Solution Approach 2:
While integrating functions, the design segments the linkage into distinct first and second link members with specific pivot points, allowing for modular manufacturing and assembly. This segmentation enables each link member to be optimized for its specific function while maintaining overall integration.
3Ease of operation
If the back assembly is separated from the seat support arrangement, then independent movement is achieved, but device complexity increases
Solution Approach 1:
The patent merges the back assembly movement with the seat support movement through the four-bar linkage. The second link member is operably connected to the first link member through pivot points, creating a coordinated system where back movement and seat movement are coupled rather than independent, simplifying the overall control mechanism.
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 provides a durable, visually appealing, and cost-effective seating design with reduced manufacturing complexity, enhancing user comfort and operational longevity by simplifying the movement mechanism and integrating flexible support effectively.
Implementation Method 1
the third link member being substantially flexible along a majority of a length thereof
Implementation Method 2
the fourth link member being substantially rigid along a majority of a length thereof
Implementation Method 3
The first link member, the second link member, the third link member and the fourth link member cooperate to form a linkage arrangement, and the seat arrangement is configured to move in a rearward direction as the back arrangement is moved between the upright position and the reclined position
Data Source
AI summary
A seating arrangement includes an upwardly-extending back arrangement movable between upright and reclined positions, and a seat arrangement that includes a first link member extending horizontally and having forward and rearward portions, a second link member spaced from the first link member, a third link member coupled to the first and second link members and substantially flexible along a majority of a length thereof, and a fourth link member operably coupled to the first and second link members, the fourth link member being substantially rigid along a majority of a length thereof, wherein the link members cooperate to form a four-bar linkage assembly, and wherein the seat arrangement moves in a rearward direction as the back arrangement is moved between the upright position and the reclined position.