Rotating Sheet Fastener Structure for Stable Tensioning
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Solution Overview
Problem
Existing sheet fasteners either experience tension relaxation leading to creases in the sheet material or require complex operations involving rotation and pulling, which are inefficient and can result in an unfavorable appearance.
Innovation Solution
A sheet fastener design featuring a first member with a fixing portion and a holder, and a second member with a fixing portion and a head, where the head is rotated to apply tension while being inserted into the first member's recess, ensuring stable engagement and efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the first and second members are engaged by pulling them together, then the sheets are temporarily under tension during engagement, but the tension relaxes after engagement is complete, causing creases in the sheet material
Solution Approach 1:
The sheet edge is preliminarily fixed to the first member before the engagement operation begins. This preliminary fixation ensures that the sheet remains under tension throughout the engagement process and prevents creases from forming after engagement is complete.
Solution Approach 2:
The second member is designed to be rotatable relative to the first member during engagement. This dynamic movement allows the operator to insert the second member by rotating it into place, maintaining sheet tension throughout the operation while simplifying the engagement process.
2Reliability
If the second member is rotated and pulled to apply tension to the sheet during engagement, then the sheet tension is maintained, but the operation becomes complex and inefficient
Solution Approach 1:
The second member is designed with rotatability, allowing it to be inserted into the first member through a simple rotational motion. This dynamic design maintains sheet tension during engagement while significantly simplifying the operation and improving efficiency.
Solution Approach 2:
Instead of pulling the second member linearly to apply tension, the design allows the second member to be rotated into place. This inverted approach to engagement maintains tension through rotation rather than pulling, simplifying the operation.
3Reliability
If the sheet edge is wound around the base end of the second member during engagement, then the sheet tension can be applied, but the intermediate of the second member must be bent, complicating the structure
Solution Approach 1:
The second member is designed to be rotatable rather than requiring bending of its intermediate section. This dynamic design allows the sheet edge to be fixed and the second member to be rotated into engagement without complex structural modifications.
Solution Approach 2:
The sheet edge is preliminarily fixed to the base end of the second member before engagement. This preliminary action eliminates the need to wind the sheet around during engagement, simplifying the second member's structure while maintaining tension application capability.
Data Source
AI summary
A first member includes a first fixing portion on which a sheet edge is fixed, a holder continuous with an end of the first fixing portion, a first recess that is defined in the holder and has an opening in a continuous direction of the first fixing portion, and a support portion that is formed opposite the first fixing portion across the opening of the first recess of the holder. A second member includes a second fixing portion on which the other sheet edge is fixed, a held portion continuous with an end of the second fixing portion. When the held portion is inserted into the first recess, the support portion is brought into contact with a surface of the second fixing portion.