Toothed Binding Member with Curved Gaps for Fiber Tangling
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Solution Overview
Problem
Existing binding technologies for bundles of recording materials, such as sheets, face challenges in efficiently tangling fibers to create a strong binding force without using staples, as they often result in fiber fracture and uneven pressure distribution.
Innovation Solution
The use of upper and lower toothed parts with specific projections and recesses, featuring depressed areas that form gaps when engaged, allowing sheets to bend and escape, thereby distributing pressure evenly and tangling fibers effectively for a stronger binding force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional binding methods without staples are used, then the binding strength is insufficient, but using staples increases the binding strength while reducing fiber tangling effectiveness
Solution Approach 1:
The recesses in the toothed parts create a porous-like structure with gaps that allow fibers to penetrate and tangle effectively. The gaps between projections and recesses form a network of channels through which recording material fibers can pass and become entangled, enhancing binding strength without fiber fracture
Solution Approach 2:
The rounded corners and curved surfaces of the projections and recesses prevent sharp edges that would cause fiber fracture. The curved geometry allows fibers to bend and tangle naturally rather than breaking against sharp corners, maintaining fiber integrity while achieving strong binding
2Strength
If uniform pressure is applied during binding, then the pressure distribution is even, but fiber tangling is insufficient; if increased pressure is applied to enhance fiber tangling, then fiber tangling improves but pressure distribution becomes uneven
Solution Approach 1:
The toothed parts feature localized gaps between projections and recesses that concentrate binding action at specific points where fibers can tangle effectively. This local quality enhancement allows strong fiber tangling at critical locations without requiring uniformly high pressure across the entire binding surface
Solution Approach 2:
The gaps between projections and recesses are pre-formed to allow fiber penetration before pressing occurs. This preliminary configuration enables fibers to position themselves for optimal tangling, so that when pressure is applied, the fibers are already in place to tangle effectively without requiring excessive force
3Strength
If the toothed parts are engaged without gaps, then the structure is compact, but sheets cannot bend and escape to tangle fibers effectively
Solution Approach 1:
The toothed parts incorporate a porous structure with intentional gaps between projections and recesses. These gaps create a network of channels that allow recording material to penetrate and fibers to tangle throughout the structure, achieving strong binding while maintaining a relatively simple toothed part geometry
Solution Approach 2:
The toothed parts are segmented into multiple projections and recesses that create discrete gaps throughout the structure. This segmentation allows sheets to bend and escape through multiple pathways, facilitating fiber tangling without requiring a complex overall structure
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enhances the binding force by allowing sheets to stretch and tangle more easily, resulting in a stronger and more secure bundle without the need for staples, while minimizing fiber fracture and improving binding consistency.
Implementation Method 1
tangling fibers effectively for a stronger binding force
Implementation Method 2
pressing direction of the toothed part
Data Source
AI summary
In a cross section shape of the toothed part, in gaps formed between a recesses and a projections when a upper toothed part and a lower toothed part are engaged without a bundle of recording materials, when the distances between the recesses and the projections in a pressing direction of the toothed part at positions where the distances from a center lines of the projections in a direction perpendicular to the pressing direction of the toothed part to the surfaces of the projections in the direction perpendicular to the pressing direction of the toothed part are a distance L1 are H1, and the distances between the recesses and the projections at positions where the distances from the center lines to surfaces of the projections in the direction perpendicular to the pressing direction of the toothed part are H2, a combination of L1 and L2 satisfies H1 is smaller than H2.