V-Pole Holder With Tensioned Arms for Shadow-Free Backdrops
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Solution Overview
Problem
Existing mechanisms for holding and positioning backdrops, screens, and graphics in the photographic industry face limitations in maximum length/width, vertical hanging, and shadow casting, with grips causing issues when materials are removed.
Innovation Solution
A V-Pole holder with variable-length arms connected by an elbow with a tensioning mechanism that allows for adjustable positioning and secure grasping, enabling the holding of flexible materials without casting shadows, and featuring a floor stand and clamps for secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional spreader arms are used to hold backdrops and screens, then the material can be supported, but the arms cast shadows and obstruct the camera view
Solution Approach 1:
The holder is divided into two separate arms that can be positioned independently on either side of the light source, rather than using a single centralized support structure. This segmentation allows the arms to be placed in positions that do not interfere with the camera view or cast shadows on the backdrop.
Solution Approach 2:
The patent introduces an intermediary positioning system where the arms are held at specific distances from the light source using adjustable mechanisms. This intermediary positioning ensures the arms support the material without directly blocking the light path or camera view.
2Device complexity
If fixed-length arms are used in the holder, then the structure is simple, but the range of flexible material dimensions that can be handled is limited
Solution Approach 1:
The arms are made adjustable in length rather than fixed, allowing the holder to adapt to different sizes of backdrops, screens, and graphics. The adjustable length mechanism enables the same device to handle a wide range of material dimensions while maintaining structural integrity.
Solution Approach 2:
The holder is designed with universal adaptability through adjustable arm lengths and configurable tensioning mechanisms, allowing it to serve multiple functions across different applications and material sizes, rather than requiring separate devices for each dimension.
3Shape
If tensioning mechanism is engaged to press arms apart, then the material is stretched flat, but the structure becomes more complex
Solution Approach 1:
The tensioning mechanism is designed to automatically engage and create outward pressure on the arms when the holder is assembled, eliminating the need for separate manual tensioning operations. The springs self-generate the necessary force to keep the arms pressed apart and the material stretched flat.
Solution Approach 2:
The patent replaces complex manual tensioning systems with simple spring-loaded mechanisms that automatically provide the necessary outward pressure. This substitution simplifies the overall structure while maintaining the ability to stretch and flatten the material effectively.
4Strength
If grips are used to secure material to the holder, then the material is held firmly, but the grips cause problems when material needs to be removed
Solution Approach 1:
The gripping mechanism is designed to be easily extractable or removable from the arms, allowing the material to be quickly released and removed without dealing with permanent or difficult-to-open grips. The grips can be detached separately from the main holder structure.
Data Source
AI summary
A holder for flexible materials which incorporate two arms connected by an elbow. Within the elbow is a tensioning mechanism which, when engaged, tends to press the arm apart. When the tension is released, the holder collapses into an easily stored mechanism. With the arms being variable in length, the range of material dimensions is greatly enhanced. A connector positioned at the elbow permits the holder to be secured to a base and arranged in gangs to address the particular need at the time.