Hidden Screen Assembly With External Pull-Line Tension Adjustment
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Solution Overview
Problem
Existing hidden screens face issues with inconvenient adjustment due to pull line mechanisms on the inner side of the frame, require tools for assembly and maintenance, and suffer from structural weaknesses leading to light leakage and insect/dust intrusion when used in large-width applications.
Innovation Solution
The mechanism for adjusting pull lines is positioned on the outer side of the cylinder body, allowing tool-free adjustment, and the frame materials are assembled using convex ribs and embedding grooves, with a mounting member facilitating tool-less disassembly and a positioning bar preventing screen movement under large rolling forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the pull line adjusting and controlling apparatus is mounted on the inner side of the frame body, then the structure is compact, but the adjustment operation is hindered by the screen or movable frame causing inconvenient adjustment
Solution Approach 1:
The pull line adjusting and controlling apparatus is inverted from the conventional inner-side mounting to outer-side mounting on the cylinder body. This inversion allows the adjusting tool to access the apparatus from the outside, eliminating the hindrance caused by the screen and movable frame, while maintaining structural compactness through the cylindrical configuration.
2Strength
If bolts are used to assemble the cylinder body of the rolling bar to the outer frame, then the connection is secure, but disassembly requires tools and increases human cost
Solution Approach 1:
The bolted mechanical connection system is replaced with a magnetic field-based magnetic attraction connection system. The outer frame and cylinder body are equipped with magnetic components that provide secure connection through magnetic force, while allowing tool-free disassembly by simply overcoming the magnetic attraction, thereby reducing labor costs and improving maintenance convenience.
3Force
If a rolling bar with large rolling force is configured for large-width screens, then the rolling capability is sufficient, but the unfolded screen moves causing light leakage and reduced shielding
Solution Approach 1:
A positioning feedback mechanism is introduced where the positioning bar on the movable frame interacts with positioning grooves on the outer frame. This feedback system continuously monitors and corrects the screen position, ensuring that even under large rolling forces, the screen remains properly positioned without light leakage or shielding reduction.
Solution Approach 2:
The positioning bar acts as an intermediary element between the rolling bar and the outer frame. It mediates the interaction by providing mechanical guidance through the positioning grooves, ensuring that the large rolling force is transmitted effectively while maintaining screen position stability and preventing unwanted screen movement.
Data Source
AI summary
A screen device includes a cylinder body, a movable frame and two first frame materials, wherein the cylinder body and the movable frame are disposed between the two first frame materials, and a rolling bar is disposed in the cylinder body; a screen is disposed between the rolling bar and the movable frame, and at least one rotating member is disposed in the cylinder body; at least one pull line penetrates the movable frame, and at least one end of the pull line penetrates the first frame material to extend into the cylinder body, and is then combined to the rotating member; the rotating member is disposed on a side portion of the cylinder body, and therefore, the rotating member can be adjusted and controlled only by using a tool on the side portion of the cylinder body, so as to adjust and control the tightness of the pull line when needed. The process thereof is completely free from blockages caused by any component, and adjustment and control is really convenient.