Screen Retaining Member With Needle Parts for Guide Units
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Solution Overview
Problem
Conventional screen devices with integral molded resin guide units are prone to bending and partial breakage during expansion and storage, leading to potential damage to the screen, necessitating multiple guide units made of different materials, which complicates manufacturing and increases costs.
Innovation Solution
A screen device with a first guide formed by connecting multiple guide units, each with a pair of side walls and a bottom wall, featuring pins and openings for connection, and a screen retaining member with needle-like parts that attach to a bendable base, allowing the screen to be securely held without slipping during expansion and storage, using only one type of guide unit material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If integral molded resin guide units are used, then the structure is simple and manufacturing is easy, but the guide units are prone to bending and partial breakage during expansion and storage
Solution Approach 1:
The first guide is divided into multiple first guide units (63) that can be connected together. Each guide unit is a separate component that can be individually replaced if damaged, while maintaining the overall functionality of the guide system. This segmentation prevents the entire guide from failing due to damage in one location.
Solution Approach 2:
The patent changes the material parameter of the guide units from integral molded resin to a more durable material composition. The first guide units are made with enhanced material properties that resist bending and breakage during expansion and storage cycles, while still maintaining ease of manufacture through standardized production processes.
2Reliability
If multiple guide units made of different materials are prepared to match different screen materials, then screen damage is prevented, but the device complexity increases
Solution Approach 1:
The first guide units are designed with universal applicability to work with different screen materials (mesh, fabric, vinyl) without requiring different guide unit materials. The standardized design and material composition of the guide units allow them to function reliably across various screen types, eliminating the need for multiple specialized guide unit variants.
Solution Approach 2:
The patent employs homogeneous material composition for all first guide units, regardless of the screen material being used. This standardization simplifies the device by using only one type of guide unit material, reducing inventory complexity while maintaining compatibility with different screen materials through proper design and attachment mechanisms.
3Stability of the object's composition
If rigid protrusions are added to hold the screen, then screen stability is improved, but the guide units become more complex and prone to breakage
Solution Approach 1:
Instead of rigid protrusions that can break, the patent uses flexible retaining members (9) with needle-like parts (92) that can bend and adapt to the screen material while maintaining holding functionality. This flexible approach provides screen stability without the brittleness of rigid structures, reducing the risk of breakage during expansion and storage operations.
Data Source
AI summary
A screen device includes a screen retaining member defined by needle-shaped parts attached, in intervals, to a longitudinal base part which is bendable in a pivotally movable direction of each of plural guide units. In an attached condition of the screen retaining member, the longitudinal base part is supported between a rail part and a supporting piece of each of the guide units and all of the needle-shaped parts protrude inwardly between opposing side walls of each of the guide units.