Friction String Stopper Structure Without Elastic Creep
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing string tightening tools suffer from strength degradation due to creep deformation and require large sizes to maintain elastic force, compromising their effectiveness and operability.
Innovation Solution
A string stopper design featuring a plug and socket configuration with a tapered rectangular parallelepiped protruding portion and a socket with an inclined surface, utilizing frictional force for fixation and allowing smooth movement, eliminating the need for elastic members and reducing size while maintaining strength and longevity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If elastic portions are formed as thin pieces to provide elastic force, then the string tightening tool can function, but strength decreases due to creep deformation
Solution Approach 1:
The patent removes the elastic portion entirely from the string tightening tool. Instead of using elastic force to hold the string, the design uses a simple mechanical structure where the string is held by friction between the string itself and the contact surfaces of the tool body, eliminating the reliability issue of elastic portion creep deformation
Solution Approach 2:
The patent replaces the elastic mechanical system with a friction-based mechanical system. The string tightening function is achieved through friction force between the string and contact surfaces rather than through elastic recovery force, fundamentally changing the mechanical principle while maintaining the tightening function
2Force
If the elastic portion is formed into a long piece shape to obtain sufficient elastic force, then the elastic force is adequate, but the string tightening tool becomes large in size
Solution Approach 1:
By removing the elastic portion entirely, the patent eliminates the need for a long-piece structure to generate elastic force. The tool achieves string tightening through friction between the string and contact surfaces, allowing for a compact design without the volume penalty of long elastic members
Solution Approach 2:
The string itself serves the dual function of being tightened and providing the friction necessary for holding. The string's own surface and tension create the friction force needed to maintain the tightened state, eliminating the need for separate elastic components that would increase tool size
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 provides a compact, durable, and operable string stopper that can accurately fix and move with respect to string-shaped members without elastic action, ensuring a long life and efficient operation.
Implementation Method 1
The string stopper is fixed only by a frictional force between the string stopper and the string-shaped member by merely bringing the plug and the socket relatively close to each other
Data Source
AI summary
There is provided a string stopper including: a plug including: a plug base portion which includes plate-shaped portions and connection portion connecting the plate-shaped portions; a leg portion which includes a protruding portion; and a plug opening which is formed from the connection portion to both sides of the leg portion; and a socket including: a socket base portion; and a socket opening which is formed of a hole having an inclined surface, and which is configured to accommodate a tip end of the protruding portion. When a string-shaped member is installed, the string-shaped member passes between the protruding portion and the inclined surface, the string-shaped member passing through the plug opening, exiting from the plug through a side of the leg portion, passing through the socket opening and exiting from the socket.