Rotary Head Flashlight Brightness Control and Magnetic Mount
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Solution Overview
Problem
Existing flashlights face challenges in providing variable light output and compact dimming controls, especially in very compact designs, which are inconvenient for users with large hands and add bulk to the device. Additionally, existing mounting systems can be bulky and cumbersome.
Innovation Solution
A flashlight design with a rotatable head portion that adjusts brightness levels electronically, allowing for multiple output states without the need for external switches, and a compact mounting system using a removable tailcap with a magnetic attachment facility that allows for secure and compact mounting to various surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional mechanical contact switches are used for brightness control, then multiple light outputs can be achieved, but the flashlight becomes bulky and complex
Solution Approach 1:
The patent replaces mechanical contact switches with an electronic control system using a microcontroller and electronic switching elements. This substitution eliminates the need for complex mechanical contact arrangements while achieving multiple light output levels through electronic control of LED intensity, thereby reducing device complexity and enabling more compact design.
Solution Approach 2:
The patent implements dynamic brightness control through a microcontroller that can adjust LED output levels based on user input. The system provides multiple static output levels (high, medium, low) and dynamic dimming capability, allowing the flashlight to adapt between different illumination requirements without requiring separate physical switches for each mode.
2Ease of operation
If dimming controls are added to very compact flashlights, then brightness control is achieved, but the flashlight circumference expands beyond battery envelope
Solution Approach 1:
The patent merges the brightness control functionality directly into the existing flashlight head structure. The control elements are integrated within the head assembly rather than being added as external components, allowing the control mechanism to be contained within the existing cylindrical envelope defined by the battery, thus avoiding expansion of the flashlight's overall dimensions.
Solution Approach 2:
The flashlight head serves multiple functions: it houses the light source, the control electronics for brightness adjustment, and the structural housing. By making the head a multi-functional component that integrates control elements, the design avoids adding separate control modules that would increase the flashlight's circumference beyond the battery envelope.
3Adaptability or versatility
If mounting facilities are added to flashlights, then hands-free use is enabled, but the mounting systems are bulky and cumbersome
Solution Approach 1:
The patent extracts the mounting functionality from bulky integrated mounting systems and implements it through a compact tailcap design. The tailcap serves as the mounting interface, allowing the flashlight to be attached to various surfaces or accessories without requiring large dedicated mounting structures on the flashlight body, thus minimizing the volume added by mounting capability.
Solution Approach 2:
Instead of adding mounting facilities to the main body of the flashlight, the patent inverts the approach by making the tailcap itself the mounting interface. This reversal allows mounting functionality to be achieved through the existing structural element at the end of the flashlight, eliminating the need for additional bulky mounting components.
4Adaptability or versatility
If multiple light sources are used for different brightness levels, then variable output is achieved, but the flashlight structure becomes more complex
Solution Approach 1:
The patent uses a single LED light source and achieves variable light output by changing the electrical parameters (current intensity) supplied to the LED. The microcontroller adjusts the drive current to the LED to provide multiple brightness levels, eliminating the need for multiple physical light sources and their associated mounting and control structures, thereby reducing device complexity.
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
Enables efficient and compact control of light output with a clean profile and easy handling, while providing versatile and secure mounting options that do not add bulk to the flashlight, enhancing usability and miniaturization.
Implementation Method 1
a compact mounting system using a removable tailcap with a magnetic attachment facility that allows for secure and compact mounting to various surfaces
Data Source
AI summary
A flashlight has a lamp assembly with a number of operating states including an off state and a number of different brightness level output states The flashlight has an elongated housing with opposed forward and rear ends. The housing has a body portion extending to the rear end, and a head portion rotatably attached to the body portion and extending to the forward end. The lamp operating state is based on the rotational position of the head portion with respect to the body. The body portion and head portion may be cylindrical elements of a common diameter. The head portion may include an electronic component having a rotatable input that is engaged by an element on the body portion. The flashlight may include a removable end portion opposite the head portion, with a support facility operable to support the housing, such that a user does not need to contact the housing.