Flush Control Valve Core Assembly Back Spring Pin Structure
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Solution Overview
Problem
Existing flush control valve systems in toilets face issues with the positioning and maintenance of the back spring, which can lead to jamming and loss of function due to the pin being easily bent or misplaced, and the discharge hole being difficult to clean and maintain.
Innovation Solution
A flush control valve core assembly with a back spring that includes a pin structure formed by a horizontally and vertically bent spring end, allowing slidable movement within the discharge hole, and a holder matched with the valve shaft fastened to the valve core body using a nut, ensuring the pin and discharge hole remain in the correct position and preventing jamming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a cylindrical compression spring with a pin is used, then the discharge hole can be larger and easier to process, but the pin is easily bent out of shape and lost during maintenance
Solution Approach 1:
The pin structure is nested within the spring itself, formed by the spring wire bending back on itself. This integration ensures the pin cannot be lost during maintenance and eliminates the need for separate pin positioning mechanisms, while still allowing a larger discharge hole for easier manufacturing
Solution Approach 2:
The pin and spring are merged into a single integrated component. The spring wire is formed to create both the elastic element and the pin structure, eliminating separate parts and reducing the risk of loss or mispositioning during maintenance operations
2Ease of operation
If the pin extends from the spring end, then it can clean the discharge hole, but the spring is not easily positioned and is too big
Solution Approach 1:
The pin is nested within the spring structure, formed by the spring wire bending back. This reduces the overall size of the spring assembly and simplifies positioning, while the pin tip remains accessible to perform cleaning functions in the discharge hole
Solution Approach 2:
The spring wire is formed in three-dimensional space to create both the coil structure and the pin extension. This spatial formation allows the pin to extend in a specific direction for cleaning while keeping the spring compact and easy to position within the valve assembly
3Reliability
If the discharge hole is made very small, then it is harder to jam, but it is difficult to make and clean
Solution Approach 1:
The pin structure performs self-cleaning of the discharge hole during normal operation. As the spring moves, the pin tip automatically clears impurities from the discharge hole, maintaining flow without requiring separate cleaning operations or overly small holes that would be difficult to manufacture
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 more reliable and easily mountable back spring that maintains the discharge hole's integrity, preventing jamming and facilitating maintenance by ensuring the pin remains in place and functional, reducing the risk of bending or loss during use and maintenance.
Implementation Method 1
a back spring (12) accommodated in the valve core body (11)
Implementation Method 2
A portion of the back spring (12) extends as a pin structure (122), which is able to slidably move in the discharge hole (141)
Data Source
AI summary
A flush control valve core assembly is provided including a valve core body, a back spring accommodated in the valve core body, a valve piece and a valve shaft. The valve piece includes a discharge hole. A portion of the back spring extends as a pin structure, which is able to slidably move in the discharge hole. The pin structure is formed by a free end of the back spring horizontally bending towards the center, and then bending downwards vertically. The back spring of the flush control valve core assembly has a smaller size, which is more reliable and more easily mounted.