Hydrin Rubber Cap for Microswitch Sealing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Microswitches face contact failure due to siloxane gas deposition from silicone-based materials, and existing sealing methods using silicone rubber or ethylene/propylene-based copolymer rubber are inadequate in preventing gas entry and maintaining a sealed structure, especially in environments with oils, leading to poor long-term performance.
Innovation Solution
A microswitch with a rubber cap made of hydrin-based rubber, which effectively prevents siloxane gas entry and maintains a sealed structure by using hydrin-based rubber for the rubber cap, providing excellent oil resistance and flexibility, thereby reducing contact failure and ensuring long-term sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If silicone rubber is used for the rubber cap to create a sealed structure, then sealing performance is improved, but siloxane gas permeation occurs causing contact failure
Solution Approach 1:
The patent changes the material parameter from silicone rubber to hydrin-based rubber, fundamentally altering the chemical composition to eliminate siloxane gas permeation while maintaining sealing performance. This material substitution resolves the contradiction by selecting a rubber type that does not transmit siloxane gas.
Solution Approach 2:
The patent eliminates the need for secondary vulcanization treatment, using a single-vulcanization hydrin-based rubber that provides sufficient sealing performance without requiring additional processing steps or time-consuming quality control procedures.
2Object-affected harmful factors
If silicone rubber undergoes secondary vulcanization to remove residual siloxane gas, then gas permeation is reduced, but production complexity and quality control burden increase
Solution Approach 1:
The patent uses hydrin-based rubber that requires only single vulcanization, eliminating the need for secondary vulcanization treatment. This simplifies the production process and reduces quality control burden while effectively preventing siloxane gas permeation from the outset.
Solution Approach 2:
The patent extracts the problematic siloxane-containing silicone rubber from the system and replaces it with hydrin-based rubber that does not generate siloxane gas, thereby eliminating the need for secondary vulcanization and associated complexity.
3Object-affected harmful factors
If ethylene/propylene-based copolymer rubber is used for the gasket to prevent dust and liquid entry, then sealing against contaminants is improved, but oil resistance deteriorates causing long-term degradation
Solution Approach 1:
The patent changes the material parameter from ethylene/propylene-based copolymer rubber to hydrin-based rubber, fundamentally altering the chemical composition to achieve both contaminant prevention and superior oil resistance. The hydrin-based rubber's molecular structure provides inherent resistance to both contaminants and oils.
Solution Approach 2:
The patent employs hydrin-based rubber as a composite material solution that integrates multiple protective properties: it prevents siloxane gas permeation, blocks contaminant entry, and provides excellent oil resistance, thereby resolving the contradictions through a multi-functional material.
4Object-affected harmful factors
If hydrin-based rubber is used for the rubber cap to prevent siloxane gas entry, then gas barrier performance is improved, but flexibility and operability may be compromised
Solution Approach 1:
The patent changes the material parameter to hydrin-based rubber, which maintains adequate flexibility and operability for push button actuation while providing superior siloxane gas barrier performance. The material's physical properties are sufficient to enable the required mechanical operations.
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 hydrin-based rubber cap effectively suppresses siloxane gas entry and prevents oil absorption, maintaining a sealed structure and reducing contact failure, while offering comparable performance to silicone rubber in terms of flexibility and operability, even in low-temperature environments.
Implementation Method 1
the hydrin-based rubber has a property of effectively preventing a siloxane gas from penetrating through
Implementation Method 2
the hydrin-based rubber has excellent grease resistance and thus is poor in absorbing grease
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The electronic component includes: a case (2); a switching mechanism embedded in the case (2); a push button (14), which is an actuator, configured to actuate the switching mechanism, the push button (14) mounted in the case (2) so as to slidingly displace; and a rubber cap (16) configured to seal a sliding part of the push button (14), in which the rubber cap (16) is made of a hydrin-based rubber.