String Securing Device Ratchet Cap Flexible Members
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Solution Overview
Problem
Conventional string/shoelace securing devices face issues with uneven force distribution and complex installation processes, leading to non-smooth operation and maintenance difficulties.
Innovation Solution
A string securing device with a base, central post, shaft, ring, spool, and cap, featuring ratchet teeth and flexible members that provide even force distribution, allowing smooth operation and easy maintenance by using a cap that rotates to tighten and lift to loosen the string, with a collar for reinforcement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If positioning pins are positioned by a ring and the positioning pins compress springs, then the positioning function is achieved, but the rotation of the cap is not smooth due to uneven force distribution
Solution Approach 1:
The patent applies local quality by making the flexible members have different lengths, allowing each member to exert force at different positions on the spool. This creates localized force distribution that ensures the spool is pushed straight upward without uneven biasing, resolving the rotation smoothness issue while maintaining positioning reliability
Solution Approach 2:
The patent changes the parameter of flexible member length to optimize force distribution. By having flexible members of different lengths, the system achieves balanced upward force on the spool, eliminating the uneven force distribution that caused non-smooth rotation in conventional designs
2Reliability
If springs are installed into reception holes to provide positioning force, then the positioning function is achieved, but the installation process becomes time-consuming
Solution Approach 1:
The patent extracts the spring component from the system and replaces it with flexible members made of elastic material. This elimination of the spring component removes the need for time-consuming installation into reception holes, significantly simplifying the manufacturing process while maintaining the positioning function through the elastic deformation of the flexible members
Solution Approach 2:
The flexible members are designed as simple elastic components that can be easily replaced if needed, eliminating the need for complex spring installation. These simple elastic elements are easier and faster to install than conventional springs, reducing manufacturing time and complexity
3Strength
If a bolt extends from the underside of the base to connect the cap, then the structural connection is achieved, but the device must be completely separated for any part replacement between base and cap
Solution Approach 1:
The patent segments the connection structure by separating the bolt connection from the positioning function. The bolt provides structural connection strength while the flexible members handle positioning, allowing independent replacement of components without complete device disassembly, thus improving ease of repair while maintaining structural integrity
Solution Approach 2:
The patent introduces dynamic flexibility through the elastic flexible members, allowing the positioning system to adapt during operation. This dynamic component can be replaced independently of the structural bolt connection, enabling easier maintenance without compromising the structural connection strength
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 ensures smooth and reliable operation of the cap, simplifies maintenance, and allows for even force distribution, addressing the issues of uneven biasing forces and complex installation in existing devices.
Implementation Method 1
multiple flexible members connected to an underside of the ring... the forces between the cap and the spool are even so that the operation of the cap is more reliable and smooth
Data Source
AI summary
A string securing device includes a base having a central post extending centrally therefrom. A shaft extends through the passage in the central post so as to be connected to the cap mounted to the base by a bolt which extends through the cap from a top of the cap. A ring and a spool are located between the base and the cap, wherein the spool is rotated with the cap by engagement of first and second teeth on the spool and the cap respectively. The ring has multiple ratchet teeth which are removably engaged with third teeth on the cap so as to allow the cap to rotate in one direction. The ring includes flexible members which are deformed to lower the ring and provides straight and upward force to the cap.