Foldable Grandstand Seat Structure for Fast Sit-Stand Conversion
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Solution Overview
Problem
Existing grandstand seating systems face challenges in efficiently converting between standing and seated positions, resulting in high conversion costs, complex assembly, and reduced space due to protruding parts and obstructed views, while also failing to optimize seat height and stability.
Innovation Solution
A convertible, collapsible, and unfoldable seat element with four foldable fastening feet and a releasable seat lock, allowing for synchronized vertical movement between standing and seated positions without shifting the seat part, and featuring a backrest that can be used as a lever for easy conversion, ensuring optimal seat height and reduced protrusions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If removable seating elements are used to convert grandstands between standing and seated positions, then the grandstand can be adapted to different event requirements, but conversion costs and work effort increase significantly
Solution Approach 1:
The invention merges the standing platform and seated position into a single integrated seat element. The seat element includes a seat part, back part, and integrated support structure that provides both standing and seating functions without requiring separate removable components, thereby eliminating conversion costs and assembly work.
Solution Approach 2:
The seat element is designed as a universal component that serves multiple functions: it provides a standing platform when unfolded and a seated position when folded. This multi-functionality eliminates the need for separate standing and seating structures, allowing the grandstand to adapt to different event requirements without additional components.
2Adaptability or versatility
If traditional foldable seat designs are used, then conversion between standing and seated positions is possible, but the seat height cannot be optimized and depends on grandstand step height
Solution Approach 1:
The support structure is designed as a dynamic, foldable mechanism that can transition between extended and retracted positions. This dynamic structure allows the seat element to adapt its height and configuration based on whether it is providing a standing platform or a seated position, independent of the grandstand step height.
Solution Approach 2:
The support structure is divided into multiple foldable segments (first and second support parts) that can independently adjust their positions. This segmentation allows precise control over the seat height and angle, enabling optimization of seating comfort regardless of the underlying grandstand step dimensions.
3Strength
If fixed railing brackets are integrated into all seats for standing position support, then structural support is provided, but a cage effect is created for spectators
Solution Approach 1:
The support structure provides strength locally at the seat element level through its integrated foldable mechanism, rather than requiring continuous fixed railings across all seats. This localized support maintains structural integrity while eliminating the visual and physical cage effect that would result from comprehensive fixed railing integration.
4Adaptability or versatility
If manual folding of each seat element is required for conversion, then conversion can be performed, but the process is time-consuming and labor-intensive
Solution Approach 1:
The seat element is designed with self-folding capabilities through its integrated support structure. When the seat element is released from its locked position, the foldable support structure automatically folds to convert the seat into a standing platform, eliminating the need for manual intervention and significantly reducing conversion time.
Solution Approach 2:
The conversion process utilizes periodic mechanical action through the foldable support structure, which automatically transitions between extended and retracted positions. This periodic folding mechanism enables rapid, repetitive conversion of multiple seat elements without manual intervention, reducing overall conversion time.
Data Source
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AI summary
The invention relates to a convertible, collapsible and collapsible seating element (1) for a grandstand that can be used either as a standing or seated grandstand. It comprises a seat section (2) and a foldable back section (3), which, in the standing position of the seat section (1), can be folded onto the seat section (2) and forms a platform (5) covering the seat section (1) from above. It is proposed that the seat section (1) has four foldable mounting feet (6, 7, 8, 9), each consisting of an upper and a lower pivotable foot section (10-17). The lower foot sections (11, 13, 15, 17) are mounted at the bottom on base plates (18), and the upper foot sections (10, 12, 14, 16) are mounted at the top on seat side sections (19).The upper ends of the lower foot sections (11, 13, 15, 17) and the lower ends of the upper foot sections (10, 12, 14, 16) are mounted on foot side connecting pieces (20), with a left (7) and a right (9) folding mounting foot being interlocked there with a foot section toothing (21). A seat locking mechanism (22) secures the foot sections (10, 11, 14, 15) in the seat position against pivoting forward. Seat side pieces (19) are attached to a seat cross connecting piece (24), to which the upper foot sections (10, 12, 14, 16) and/or a seat section (2) and/or the back section (3) are mounted.