Two-Piece Rocker Assembly Snap-Fit Design
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Solution Overview
Problem
Rocker switch assemblies in prior art suffer from aesthetic issues, production difficulties, and fit problems due to the 2-step molding process, which results in shrinkage issues and high tooling costs.
Innovation Solution
A two-piece rocker switch assembly with a snap-fit design, where the inner rocker is secured within the outer rocker using latch beams and retention members, eliminating the need for overmolding and allowing for separate manufacturing and assembly, thereby improving fit and reducing production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a 2-step molding process is used to manufacture rocker switch assemblies, then the components can be integrated into a single piece, but shrinkage problems occur resulting in poor fit and high tooling costs
Solution Approach 1:
The rocker switch assembly is divided into separate components: a rocker body and a rocker cap. These components are manufactured independently using single-step molding processes, avoiding the shrinkage issues of 2-step molding. The components are then joined through a snap-fit mechanism with retention members and latch beams, ensuring precise fit without the drawbacks of overmolding.
Solution Approach 2:
The rocker cap is designed to fit over the rocker body, with the cap being inserted onto the body through a snap-fit connection. The retention members on the body engage with latch beams on the cap, creating a nested structure where the cap encompasses the body while maintaining precise alignment and fit through the engagement features.
2Device complexity
If a 2-step molding process is used, then component integration is achieved, but tooling costs increase significantly
Solution Approach 1:
The assembly is segmented into separately moldable components (rocker body and rocker cap) that can be produced using standard single-step molding processes. This eliminates the need for expensive 2-step molding tooling while achieving the desired integrated appearance through the snap-fit connection of the segmented parts.
3Productivity
If prior art rocker switch assemblies are manufactured, then production can proceed with standard processes, but aesthetic appeal is compromised and production difficulties arise
Solution Approach 1:
The rocker assembly is segmented into a body and cap that can be manufactured using standard single-step molding processes, maintaining productivity. The segmented design with precise snap-fit engagement features enables complex aesthetic shapes and configurations that would be difficult to achieve with traditional overmolding, while still using conventional manufacturing equipment.
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 snap-fit design enhances the aesthetic appeal, simplifies production, and ensures proper fitment of components, reducing the likelihood of lock failure and improving manufacturing efficiency by avoiding the drawbacks of the 2-step molding process.
Implementation Method 1
an inner rocker having at least one latch beam that engages the at least one retention member to allow the inner rocker to be secured within the inner body of the outer rocker
Data Source
AI summary
A two-piece rocker assembly having an inner rocker and an outer rocker, the inner rocker being snap-fit into the outer rocker via a connection between at least one flange and at least one latch beam. In certain embodiments, a locking member is added to the two-piece rocker assembly.