Deployable Display Expansion Using Elastic Resting-Length Limiting
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Solution Overview
Problem
Existing display expansion systems require multiple physical elements for contraction and limiting mechanisms, leading to increased complexity and manufacturing costs, with elastic bands being permanently stretched, which accelerates material degradation and loss of force.
Innovation Solution
A minimalist expansion system using a single elastic band with a 'resting length' that determines the display's expansion, eliminating the need for additional limiting devices by leveraging the elastic band's natural resting length to create a 'soft limiting' system, allowing for adjustable expansion without mechanical stops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple physical elements (contraction member and limiting member) are used in the expansion system, then the expansion control is precise and reliable, but the device complexity and manufacturing costs increase
Solution Approach 1:
The patent combines the contraction member and limiting member into a single integrated elastic element. The elastic band is designed with specific geometric features (such as folded sections or constrained paths) that simultaneously provide the contracting force and limit the contraction travel, eliminating the need for separate limiting members and reducing overall system complexity while maintaining functional reliability
Solution Approach 2:
The elastic band is designed to perform multiple functions: it provides the contracting force through its elastic properties, limits the contraction travel through its geometric configuration or engagement with display features, and may also guide the expansion motion. This multi-functional design reduces the number of components needed in the expansion system
2Ease of operation
If elastic bands are permanently stretched to achieve expansion, then the display can be deployed from a flattened position, but the material degradation accelerates and force is lost over time
Solution Approach 1:
The elastic band is pre-configured in a stretched state during manufacturing, with its resting length designed to correspond to the expanded display configuration. This preliminary action allows the display to be transported in a compact flattened state while ensuring that upon deployment, the elastic band naturally returns to its pre-set resting length, providing consistent expansion force without requiring excessive stretching during operation
Solution Approach 2:
The patent optimizes the elastic band's physical parameters, particularly its resting length and elastic modulus, to achieve the desired expansion force while minimizing permanent deformation. By carefully selecting these parameters, the elastic band can repeatedly cycle between stretched and relaxed states without significant degradation, extending its service life
3Manufacturing precision
If intermediate separating plates with specific dimensions are used to limit expansion, then the expansion is well-calculated and controlled, but different displays require different separating plates increasing manufacturing complexity
Solution Approach 1:
The elastic band is designed with a universal geometric configuration that can be applied across different display types and sizes. By adjusting the resting length and engagement points of the same basic elastic band design, the system can accommodate various display configurations without requiring different limiting plate geometries, thus maintaining manufacturing precision while improving adaptability
Solution Approach 2:
Instead of changing the physical geometry of limiting plates for different displays, the patent achieves adaptation by changing the parameters of the elastic band (resting length, width, material properties) while maintaining the same basic structural design. This allows a single limiting mechanism design to work across multiple display types
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
Simplifies the manufacturing process, reduces material degradation, and achieves accurate expansion control with a margin of inaccuracy tolerable for various display configurations, offering cost advantages and effective expansion without additional physical limiting elements.
Implementation Method 1
The mentioned contraction member always incorporates one or several elastic elements acting such as to provide the contraction force
Data Source
AI summary
Deployable display with an expansion system comprising a traction elastic element. The elastic element is basically formed by an elastic band which is annular or is cord-type with engaging elements, and optionally by at least one extension for extending the length of a said band, formed by a plate made of flexible or semi-flexible sheet material provided with engaging elements for said elastic band, the assembly in turn being engaged to side projections of the display. The limiting system is implemented by the reduction in the elastic force and/or by the own resting length of the elastic band in cooperation, where appropriate, with the length of the extension element.