Flashlight Switch Assembly With Compact Sealing and Multi-Mode Control
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Solution Overview
Problem
Existing flashlight assemblies with sealed electronics compartments have bulky and expensive seals, and are limited to bimodal operating states, lacking versatility and reliability.
Innovation Solution
A flashlight assembly with a subframe and seal design that uses a V-ring and O-ring for a low-profile, fluid-impermeable seal, and a switch assembly with a rotatable wheel and cam for multiple operating modes, including a temporary surge mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high-profile sealed electronics compartments with adhesives or compression-type seals are used, then sealing reliability is improved, but device complexity and cost increase
Solution Approach 1:
The patent employs an O-ring seal, which is a flexible elastomeric ring that creates a fluid-impermeable barrier through its ability to deform and conform to mating surfaces. This flexible membrane approach replaces complex adhesive or compression-type sealing systems, achieving reliable sealing while reducing overall device complexity and cost.
2Device complexity
If bimodal operating states are implemented, then device simplicity is maintained, but operational versatility is limited
Solution Approach 1:
The patent implements a rotatable switch assembly with a wheel that can be rotated to different positions, dynamically changing the operating mode of the flashlight. The cam mechanism translates rotational position into different electrical circuit configurations, enabling multiple operating modes (including temporary surge mode) while maintaining a simple, intuitive user interface through rotational movement.
Data Source
AI summary
A flashlight assembly with an electromechanical switch assembly and internal sealed subframe, and methods of assembling and operating same, are disclosed.