Sliding Fastener Elastic Disk Design for Accessory Chains
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Solution Overview
Problem
Conventional sliding-type fasteners for accessory chains require a hard and semi-flexible elastic disk with a larger outer diameter than the hollow sphere, making insertion difficult and prone to damage, leading to a shorter lifespan due to the disk's thinness and reduced flexibility, which affects the smoothness of the sliding motion.
Innovation Solution
A sliding-type fastener with an elastic disk having an outer diameter smaller than the hollow sphere's inner diameter, allowing for easier insertion and using a highly flexible material like polyurethane, enabling the disk to be thicker and more elastic, thus reducing wear and tear and improving the sliding motion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the elastic disk is made hard and semi-flexible to maintain pressure force against the hollow sphere, then the pressure force is maintained, but the insertion difficulty increases and the disk becomes more prone to damage
Solution Approach 1:
The patent changes the material parameter from hard/semi-flexible to soft/highly flexible elastic material. This parameter change allows the disk to be easily inserted through the hollow sphere while still maintaining adequate pressure force through the elastic properties of the soft material, resolving the contradiction between pressure force maintenance and insertion ease.
2Ease of manufacture
If the elastic disk is made thin to fit through the hollow sphere, then the insertion is easier, but the disk breaks or deteriorates faster reducing lifespan
Solution Approach 1:
The patent changes the thickness parameter of the elastic disk, making it thicker rather than thin. The use of soft, highly flexible elastic material allows the thicker disk to still be inserted through the hollow sphere while the increased thickness provides greater durability and resistance to breaking, thereby extending lifespan.
3Duration of action of stationary object
If the elastic disk is made thick to increase lifespan, then the durability improves, but the insertion through the hollow sphere becomes difficult
Solution Approach 1:
The patent changes the material composition parameter to use soft, highly flexible elastic material. This material property change enables the disk to be made thick for durability while the softness and flexibility allow it to be easily compressed and inserted through the hollow sphere, resolving the contradiction between thickness for lifespan and insertion ease.
4Force
If the outer diameter of the elastic disk is larger than the inner diameter of the hollow sphere, then the pressure force is maintained, but the insertion requires forceful pressing and may damage the disk
Solution Approach 1:
The patent changes the outer diameter parameter to be smaller than the inner diameter of the hollow sphere. Combined with the use of soft elastic material, this size reduction allows easy insertion without forceful pressing, preventing damage to the disk while the elastic properties maintain adequate pressure force for fastening functionality.
5Stability of the object's composition
If the elastic disk is made of hard and semi-flexible material, then the structural stability is maintained, but the flexibility decreases affecting sliding smoothness
Solution Approach 1:
The patent changes the material parameter from hard/semi-flexible to soft/highly flexible elastic material. This parameter change improves flexibility and sliding smoothness while the elastic properties of the soft material provide sufficient structural stability to maintain the fastening function, resolving the contradiction between stability and smoothness.
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
The solution facilitates easier and more efficient insertion of the elastic disk, extends its lifespan, and ensures a smoother sliding motion for the accessory chain by utilizing a thicker, more flexible disk that is less likely to break or slip out, enhancing the product's quality and longevity.
Implementation Method 1
the elastic disk can be rolled into a smaller shape by one's fingers so that it is easily inserted in the hollow sphere
Implementation Method 2
the elastic disk is made of polyurethane rubber that is rich in elasticity
Implementation Method 3
a soft material with high flexibility can be used for the elastic disk
Data Source
AI summary
A sliding-type faster for accessary chain has a hollow sphere having a pair of through holes, an elastic disk having a hole provided in the hollow sphere, and an accessary chain that slides into the through hole of the elastic disk. The outer diameter of the elastic disk for inserting the accessory chain is smaller than the inner diameter of the hollow sphere so that the outer surface of the elastic disk does not press tightly against the inner wall surface of the hollow sphere. Material such as polyurethane having high elasticity can be used for the elastic disk. The elastic disk can easily be installed in the hollow sphere by pressing or rolling it into a ball. Because of its increased thickness, the elastic disk will not slip out from the hollow sphere and achieve a long life.