Office Chair Backrest Support for Stable Lateral Tilting
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Solution Overview
Problem
Office chairs lack the ability to provide high seating comfort and adaptability to different positions, particularly in allowing lateral tilting without compromising the stability of the backrest relative to the seating surface.
Innovation Solution
The office chair design features flexible, V-shaped or trapezoidal support arms that connect the backrest to the seat, allowing lateral tilting while maintaining stability, combined with a curved shell and cover system that adjusts rigidity to enhance comfort and prevent the backrest from moving too close to or away from the seating surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the backrest is rigidly connected to the seat support, then the backrest stability is improved, but the lateral tilting capability is worsened
Solution Approach 1:
The backrest support is divided into two separate support arms instead of a single rigid connection. These arms are spaced apart and connected via connecting elements, creating a segmented structure that allows lateral tilting while maintaining stability through the distributed support configuration
Solution Approach 2:
The support arms are designed to be flexible and/or articulated rather than rigid, enabling dynamic lateral tilting movement. The connecting elements allow the arms to pivot and adjust, providing adaptability for different seating positions while maintaining structural integrity
2Adaptability or versatility
If the support arms are made flexible and articulated, then the lateral tilting capability is improved, but the backrest stability is worsened
Solution Approach 1:
The two flexible support arms are merged with the connecting elements to form an integrated backrest support system. This combination allows the flexible arms to work together, providing lateral tilting capability while the interconnected structure maintains overall backrest stability
Solution Approach 2:
The support arms combine flexibility and articulation features within a unified structural design. The articulated connections provide flexibility for tilting while the overall composite structure of the support arms and connecting elements maintains stability
3Device complexity
If the support arms extend in parallel, then the structural simplicity is improved, but the lateral tilting effectiveness is worsened
Solution Approach 1:
The support arms are arranged in a V-shape configuration rather than parallel, creating an asymmetric structure. This V-shaped arrangement with greater spacing at the backrest side enables effective lateral tilting by creating a lever arm effect, while remaining relatively simple in construction
4Adaptability or versatility
If the V-shaped support arm arrangement is used, then the lateral tilting effectiveness is improved, but the device complexity is worsened
Solution Approach 1:
The V-shaped configuration is achieved by segmenting the support structure into two separate arms with specific spacing. This segmentation creates the geometric arrangement needed for effective lateral tilting while keeping each individual arm relatively simple in design
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
This design provides comfortable seating with lateral inclination without backrest movement relative to the user, preventing the 'shirt pulling' effect and allowing active seating by counteracting loads, thus enhancing overall seating experience.
Implementation Method 1
the backrest support comprising two support arms which are configured to be flexible and/or articulated laterally
Implementation Method 2
the support arms do not extend in parallel, but in a V-shape relative to one another, wherein the spacing of the support ends of the support arms on the backrest side is greater than the spacing of the ends of the support arms on the seat side
Data Source
AI summary
The invention relates to a seat (1), in particular an office chair, comprising a seat support (3) for a seating surface (6) and comprising a backrest support (4) of a backrest (5), which is held on the seat support (3) so as to be able to move in a tiltable manner to the side, wherein the backrest support (4) comprises two support arms (4a, 4b) which are configured to be flexible and/or articulated laterally and spaced apart from one another. Preferably, the seating surface (6) and/or the backrest (5) comprises a curved seat shell and/or backrest shell (6a, 5a) provided with a cover (6b, 5b) with a number of flexible curved ribs (15, 16) on the edge of the shell, wherein the cover is stretched by the seat shell and/or backrest shell (6a, 5a) such that when the cover (6b, 5b) is loaded, the bending of the curved ribs (15, 16) is altered.