Screen Retaining Structure That Prevents Needle Wear and Deformation
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Solution Overview
Problem
Existing screen apparatuses face issues with deformation, damage, and wear due to the repeated stabbing and slipping of rigid protrusions on the screen ends, necessitating multiple guide unit materials to match different screen types, and contact between supporting members and needle-like parts causing wear and tear.
Innovation Solution
A screen apparatus design with pivotally movable first guide units, detachable screen retaining members, and relieving pieces that bend away from supporting members, allowing the tension member to change direction without contact, and separate storage for guides to prevent damage and wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rigid protrusions are used to hold the screen end, then the screen can be prevented from slipping out, but the rigid protrusions undergo deformation and damage due to repeated stabbing and slipping
Solution Approach 1:
The patent replaces rigid protrusions with flexible needle-like parts that can elastically deform during operation. These needle-like parts are made of flexible material allowing them to bend and recover, preventing the deformation and damage issues associated with rigid structures while maintaining their ability to hold the screen end securely
Solution Approach 2:
The needle-like parts are designed to be movable and adaptable rather than fixed and rigid. They can dynamically adjust their position and orientation during screen expansion and storage operations, allowing them to accommodate varying operational conditions and reduce stress concentrations that lead to damage
2Adaptability or versatility
If multiple kinds of first guide units are used to match different screen types, then the adaptability to different screens is improved, but the device complexity increases
Solution Approach 1:
The patent designs a universal first guide unit structure that can accommodate different screen types through adjustable components. The guide unit incorporates elements that can be configured for various screen configurations, eliminating the need for multiple specialized guide units while maintaining compatibility across different screen types
Solution Approach 2:
The first guide unit is divided into modular components that can be independently adjusted or configured. This segmentation allows the same basic structure to serve multiple functions and adapt to different screen types by reconfiguring the modular elements rather than requiring entirely different guide units
3Volume of moving object
If the supporting member is positioned close to the needle-like parts, then the space utilization is improved, but contact between the supporting member and needle-like parts causes wear and tear
Solution Approach 1:
The supporting member incorporates curved or rounded surfaces that guide the needle-like parts through their motion path. This curvature design allows the needle-like parts to follow a smooth trajectory that minimizes direct contact and friction with the supporting member, reducing wear while maintaining compact spatial arrangement
Solution Approach 2:
The patent introduces an intermediary element or surface between the supporting member and needle-like parts. This intermediary component acts as a mediator that reduces direct contact and friction, allowing the supporting member to remain close to the needle-like parts for space efficiency while preventing wear and tear through the buffering intermediary layer
Data Source
AI summary
A looped tension member is disposed in a Z-axis direction, and an inside of a slidable frame is divided into first and second storage portions for respectively storing first and second guides at opposite sides in the X-axis direction. The first and second storage portions allow the tension member to pass, and direction changing members on which the tension member is suspended are provided in opposite end portions of the slidable frame in the Z-axis direction. One of the direction changing members is disposed through a supporting member at one end portion in the Z-axis direction of the first storage portion, relieving pieces extending in the Z-axis direction and opposing each other in a Y-axis direction are provided with the supporting member, and each of the relieving pieces contacts needle parts of screen retaining members and causes the needle parts to bend away from the supporting member.