Adjustable Screen Frame Tension Routing for Variable Openings
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Solution Overview
Problem
Existing screen devices face challenges in accommodating various opening sizes, requiring multiple standardized sizes and complex on-site adjustments, which complicate manufacturing and installation, especially for horizontal openings that need height adjustments.
Innovation Solution
A screen device design featuring slidably movable frame portions with tension members and bendable slide guide frames, allowing for adjustable tension and easy height modification by extracting tension members from the central portion of the frame, enabling standardized production and simplified on-site fitting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the screen device is manufactured to match all standardized opening sizes, then the device can accommodate various openings, but the number of product kinds increases and stock control becomes difficult
Solution Approach 1:
The patent creates a universal screen device design where the frame portions can accommodate different opening sizes through simple adjustment of the tension member routing, rather than requiring separate standardized products for each size. The same basic device structure serves multiple size requirements.
Solution Approach 2:
The patent enables size adjustment by changing the routing path of the tension member through different positions in the frame portions, rather than changing the overall device structure. This parameter change allows one device design to fit multiple opening sizes.
2Adaptability or versatility
If the screen device is adjusted at the working site to match specific opening sizes, then the device fits the opening, but the assembly must be broken and remade, complicating the construction
Solution Approach 1:
The patent segments the tension member routing into separate adjustable sections within the frame portions, allowing the tension member to be independently routed through different positions without affecting the overall device assembly. This enables on-site adjustment without complete disassembly.
Solution Approach 2:
The patent prepares the frame portions in advance with pre-formed tension member routing paths, so that at the working site only the routing selection is needed rather than creating the routing structure itself. This preliminary preparation simplifies on-site adjustment.
3Ease of operation
If the tension member is extracted from the upper end portion of the slidably movable screen-mounting frame portions close to the central portion, then size adjustment is facilitated, but the tension member routing becomes more complex
Solution Approach 1:
The patent extracts the tension member from the frame portion at a specific location (upper end portion close to central portion) to create an accessible adjustment point. This extraction location is chosen to balance ease of adjustment with acceptable routing complexity.
Data Source
AI summary
A shrinkable and extensible screen is mounted between a pair of screen-mounting frame portions arranged bilaterally to confront each other and at least one being slidably movable. A tension member extending through the screen for supporting it in shrinking and extending directions is routed in the screen-mounting frame portions. The tension member is extracted at the portion close to the central portion from the upper end portion of the slidably movable screen-mounting frame portions, to the outside on the side opposite to the screen mounting side.