Resin Pressure Switch Joint Coupling Holder Design
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Solution Overview
Problem
Conventional pressure switches with metal pipe joints have complex configurations, increasing manufacturing costs and time, and require additional assembly steps and parts to ensure connection strength, leading to productivity and assembly variance issues.
Innovation Solution
A pressure switch with a joint coupling made of resin material, featuring a cylindrical joint coupling holder with radially compressible engagement pawls and a cap to secure the joint coupling to the housing, eliminating the need for caulking or crimping and reducing the number of parts required.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metal pipe joint is used to connect the main body with vacuum piping, then connection strength is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent applies homogeneity by making the joint coupling holder and joint coupling both from resin material, matching the resin material of the main body. This eliminates the need for metal pipe joints and their complex connection structures, while still achieving sufficient connection strength through the integrated resin design.
2Strength
If a metal pipe joint with caulking or crimping is used, then connection strength is improved, but manufacturing time and productivity decrease
Solution Approach 1:
The patent uses a simple resin joint coupling holder and joint coupling that can be easily manufactured and assembled without requiring time-consuming metal processing operations like caulking or crimping. The resin components are designed for simple assembly that reduces manufacturing steps and increases productivity.
3Strength
If a metal washer is added to increase connection strength, then connection strength is improved, but assembly steps and number of parts increase
Solution Approach 1:
The patent merges the joint coupling holder and joint coupling into a simplified two-part resin system that eliminates the need for additional metal washers or fasteners. The resin material and integrated design combine the functions of multiple components into fewer parts, reducing assembly steps and part count.
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 reduces manufacturing costs and time, simplifies assembly, and ensures a secure connection without the need for metal washers, thereby enhancing productivity and minimizing assembly variances.
Implementation Method 1
a plurality of engagement pawls (44) which are compressible in a radial direction
Data Source
AI summary
In a pressure switch, a joint coupling holder is mounted via an opening in a case constituting a housing. A plurality of engagement pawls that make up the joint coupling holder engages with a bottom of the case. Further, by inserting a cap into a recess of the joint coupling holder, the engaged state of the engagement pawls is maintained, whereby the housing, which is made from a resin material, and the joint coupling holder are strongly and rigidly connected together.