Electrode Terminal Assembly With Protrusion Stop for Liquid Quality Meter
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electrode terminal assemblies for liquid quality meters face issues with electrode terminals being pushed into the fixing body at high-temperature and high-pressure conditions, leading to water leakage and reduced durability.
Innovation Solution
The electrode terminal assembly features a pair of rod-shaped electrode terminals with protrusions that stop within electrode through-holes of the fixing body, preventing further insertion and ensuring secure fixation, and the use of inner O-rings for sealing to prevent water infiltration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If electrode terminals are simply formed in a rod shape and inserted into the fixing body, then the structure is simple and easy to manufacture, but the electrode terminals are pushed into the fixing body under high-temperature and high-pressure conditions, causing water leakage and reduced durability
Solution Approach 1:
The electrode terminal is segmented into multiple parts: a rod-shaped body portion and a separate protrusion portion. This segmentation allows the protrusion to engage with the fixing body's through-hole in a way that prevents axial movement under pressure, while keeping the manufacturing process relatively simple by adding only a minor structural feature to the terminal design.
2Reliability
If electrode terminals are formed with protrusions to prevent pushing into the fixing body, then durability and water leakage prevention are improved, but the structure becomes more complex
Solution Approach 1:
Instead of making the entire electrode terminal structure complex, the invention applies local quality by adding protrusions only at specific locations on the terminal body. These localized protrusions engage with corresponding features in the fixing body to prevent axial movement, providing the necessary reliability without requiring complex structures throughout the entire assembly.
3Ease of manufacture
If the fixing body is formed by injection molding, then manufacturing is simple and cost-effective, but the molding dissolves at high temperatures (80°C or more), causing electrode terminals to become unfixed
Solution Approach 1:
The invention applies preliminary action by forming protrusions on the electrode terminals before assembly with the fixing body. These pre-formed protrusions are designed to engage with corresponding recesses or features in the fixing body, creating a mechanical interlock that prevents axial movement even when the fixing body material softens or dissolves at high temperatures. This preliminary structural preparation ensures stability under thermal stress without requiring changes to the injection molding process itself.
Data Source
AI summary
According to the present invention, an electrode terminal assembly for a liquid quality meter apparatus for measuring liquid quality on the basis of the electrical resistance of a liquid to be measured comprises: a pair of electrode terminals comprising a body, which contacts the liquid being measured when liquid quality is measured and has an overall rod shape, and a protruding step formed at a predetermined portion between the opposite ends of the body; and a fixing body comprising a pair of electrode through-holes through which the pair of electrode terminals pass. In the electrode terminal assembly having the above-described structure, each of the pair of electrode terminals is arranged such that, when the electrode terminals are inserted into the electrode through-holes of the fixing body by a predetermined length, the protruding step is caught by the fixing body so that the electrode terminals are no longer inserted.