Directional Sharp Protrusions for Adhesive-Free Gripping
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Solution Overview
Problem
Existing fastening solutions fail to provide durable attachment of elements that can withstand large forces, allow sliding, and be separated without damage, while also avoiding the use of adhesives and minimizing material weakness.
Innovation Solution
A gripping system featuring a surface with sharp protrusions oriented in specific directions to provide resistance, allowing for durable fastening and sliding without adhesives, with the ability to selectively adjust resistance based on the orientation of the protrusions and the presence of a separating part for easy disengagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesives are used to fasten elements, then strong and durable fastening is achieved, but the elements cannot be separated without damaging them
Solution Approach 1:
The gripping surface is divided into multiple sharp protrusions distributed across the surface. Each protrusion acts as an independent fastening element that can engage with the sliding element individually, collectively providing strong fastening while allowing controlled separation through systematic disengagement of these segmented elements
Solution Approach 2:
The sharp protrusions serve as an intermediary mechanical structure between the gripping surface and the sliding element. This intermediary mechanism enables both strong fastening through engagement and clean separation without damage, replacing the need for adhesives while achieving both strength and separability
2Ease of operation
If clasps and belt-type buckles are used, then fastening and separating elements is enabled, but moving portions and perforating weaken the joining and damage materials over time
Solution Approach 1:
The invention extracts and eliminates the moving portions and perforating mechanisms from the fastening system. By using a static gripping surface with sharp protrusions that engage directly with the sliding element, the design removes the weakening elements (holes, moving parts) while retaining the essential fastening and separating functions
Solution Approach 2:
Instead of using moving portions and perforations to achieve fastening (as in traditional clasps), the invention inverts the approach by using a static surface with fixed sharp protrusions that provide mechanical engagement. This inversion eliminates the need for material perforation and moving parts while maintaining fastening capability
3Strength
If cable ties are used, then fastening is achieved, but the clasp must be broken for separation, rendering it useless for second use
Solution Approach 1:
The gripping system is designed to be self-serving and reusable. The sharp protrusions on the gripping surface can repeatedly engage with and release from the sliding element without degradation, allowing the same fastening mechanism to be used multiple times for different fastening tasks, enhancing adaptability and versatility
4Ease of operation
If Velcro is used, then easy fastening and separating is achieved, but strong fastening is not possible and surfaces become damaged over time
Solution Approach 1:
The gripping surface employs asymmetric sharp protrusions with specific geometric configurations that provide directional engagement. This asymmetry allows the protrusions to penetrate and engage with the sliding element for strong fastening while maintaining the ability to release cleanly, overcoming the strength limitations of symmetric Velcro structures
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
Enables durable, adhesive-free fastening and sliding with adjustable resistance, allowing for repetitive use and reduced material stress, while preventing damage to the elements during separation.
Implementation Method 1
each sharp protrusion being configured to provide sliding resistance against a sliding element which slides in contact with the gripping area in the direction opposite the predetermined direction of resistance of said sharp protrusion
Data Source
Figure 1
Figure 2a~3
Figure 4~6
AI summary
The invention provides a gripping surface (1) comprising a plurality of sharp protrusions (2) arranged in a gripping area (3) of said gripping surface (1), each of them comprising a tip (4). For each sharp protrusion (2) there is a predetermined direction of resistance (5) defined as the projection over the gripping area (3) of the direction defined by the orientation of the tip (4) of said sharp protrusion (2), such that there can be different predetermined directions of resistance (5) throughout the gripping area (3). Each sharp protrusion (2) is intended for providing sliding resistance against a sliding element which slides in contact with the gripping area (3) in the direction opposite the predetermined direction of resistance (5) of said sharp protrusion (2). The invention additionally provides a separation method for separating the gripping area (3) and the sliding element (11).