Rotatable Flashlight Head for Consistent Downlight Direction
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Solution Overview
Problem
Handheld and helmet-mounted flashlights with dual light sources face challenges in maintaining the downward light direction when attached to different sides of a helmet, leading to inefficient illumination and potential interference with specialized equipment.
Innovation Solution
A flashlight design with a head that can be selectively attached to the body in two positions, allowing the downward light to face either direction, ensuring consistent illumination regardless of the helmet side and accommodating various equipment configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the flashlight is mounted on different sides of a helmet, then the downward light direction becomes inconsistent, but the illumination efficiency deteriorates
Solution Approach 1:
The head is made rotatable relative to the body through a bayonet fitting mechanism, allowing the downlight to dynamically adjust its orientation. When mounted on different sides of a helmet, the head can be rotated to ensure the downlight always faces downward, maintaining consistent illumination direction regardless of mounting position.
2Ease of manufacture
If the downlight is fixed in one direction, then the manufacturing is simplified, but the usability on different helmet sides deteriorates
Solution Approach 1:
The head assembly incorporates a rotatable joint that allows the downlight to be oriented in different directions. This dynamic capability enables the flashlight to be mounted on either the left or right side of a helmet while maintaining proper downward light direction, significantly improving usability without complicating the basic manufacturing process.
3Device complexity
If the head is fixed to the body, then the device complexity is reduced, but the adaptability to different mounting positions deteriorates
Solution Approach 1:
A bayonet fitting mechanism is implemented between the head and body, enabling the head to be rotated into different positions. This dynamic attachment system allows the flashlight to adapt to different mounting positions on helmets or other surfaces while maintaining a relatively simple overall device structure.
Solution Approach 2:
The rotatable head mechanism provides multi-position attachment capability, making the flashlight universally adaptable to different mounting scenarios (left side, right side, different angles) without requiring multiple specialized attachment mechanisms, thus maintaining simplicity while enhancing versatility.
Data Source
AI summary
Flashlights and methods of use. A flashlight includes a body that defines a longitudinal axis and a head releasably attached to the body. The head includes a front light defining a first axis parallel to the longitudinal axis and a downlight defining a second axis perpendicular to the longitudinal axis. An attachment feature is disposed on a lateral side of the body. The head is selectively attachable to the body in either of a first position and a second position. In the first position, the downlight faces a first direction relative to the body and in the second position the downlight faces a second direction relative to the body that is opposite the first direction.