Flashlight Sight Tube for Unobstructed Conduit Viewing
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Solution Overview
Problem
Conventional flashlights obstruct the user's view when attempting to observe objects through small apertures or conduits, making it difficult to illuminate and visualize objects due to the flashlight's position between the eye and the object.
Innovation Solution
A flashlight design featuring a centrally disposed cylindrical sight tube with a magnifying eyepiece, allowing the user to view and illuminate objects through a small aperture while maintaining the flashlight's position, enabling simultaneous illumination and observation without obstructing the view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional flashlight is held close to the eye to illuminate objects through a small aperture, then the illumination capability is improved, but the flashlight body obstructs the user's line of sight to the object
Solution Approach 1:
The flashlight is segmented into two separate functional components: an illumination system (flashlight body with light source) and an observation system (eyepiece with sight tube). The illumination system emits light through the aperture to illuminate the object, while the observation system provides a separate optical path for the user to view the illuminated object without the flashlight body blocking the view. This segmentation resolves the contradiction by allowing both illumination and observation to occur simultaneously without mutual interference.
Solution Approach 2:
The sight tube is nested within the flashlight body structure, with the eyepiece positioned at the rear end of the flashlight. The sight tube extends through the flashlight housing, creating a concentric arrangement where the observation path is embedded within the illumination device. This nesting allows the user to look through the sight tube while the flashlight illuminates the target, eliminating the obstruction problem while maintaining a compact handheld form factor.
2Ease of operation
If the flashlight is held at a distance from the eye to avoid obstructing the view, then the line of sight is improved, but the illumination intensity and effectiveness are reduced
Solution Approach 1:
By separating the illumination function from the observation function into distinct components, the user can hold the flashlight close to the eye for effective illumination while the sight tube provides an unobstructed viewing path. The segmentation allows both functions to operate optimally at the same position, resolving the trade-off between proximity for illumination and distance for viewing.
Solution Approach 2:
The sight tube acts as an intermediary optical element that mediates between the user's eye and the illuminated object. It provides a dedicated viewing channel that does not interfere with the illumination path, allowing the flashlight to be positioned close to the eye while maintaining clear observation through the tube.
3Device complexity
If a standard flashlight design is used, then the device simplicity is maintained, but the ability to observe objects through small apertures is lost
Solution Approach 1:
The flashlight is designed with multi-functionality by integrating both illumination and magnified observation capabilities into a single device. The addition of the eyepiece and sight tube transforms a simple flashlight into a compound tool that can both illuminate and provide magnified viewing through small apertures, enhancing adaptability while maintaining reasonable simplicity.
Solution Approach 2:
The sight tube is nested within the flashlight body, with the eyepiece integrated at the rear end. This nesting approach adds observation functionality without significantly increasing the external dimensions or complexity of the device. The compact nested arrangement allows the flashlight to maintain a simple handheld form while providing enhanced observation capability through the integrated sight tube.
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 users to effectively illuminate and magnify objects within confined spaces, such as underground valves or conduits, by allowing the flashlight to be held near the eye while maintaining a clear line of sight through the sight tube, thus simplifying inspection and operation tasks.
Implementation Method 1
a magnifying eyepiece secured to a second end of the sight tube
Data Source
AI summary
A flashlight device for observing an object in a conduit includes a plurality of lights disposed in a front end of an enclosure in a substantially annular configuration about a viewing aperture extending longitudinally through a central portion of the enclosure, and at least one battery for energizing the plurality of lights. The device allows the person via one hand to illuminate and simultaneously observe an object located at a distal portion of a conduit, while the opposite hand holds a tool that engages the distal object.