Pivoting Reflective Surface Spirit Level for Wide-Angle Viewing
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Solution Overview
Problem
Conventional spirit levels have a limited direct opposite angular viewing range of ±5°, restricting users' ability to efficiently and comfortably use them when not standing directly opposite the level, especially when working in confined or offset positions.
Innovation Solution
The spirit level features a manually pivotal reflective surface that can be adjusted ±35° from its non-pivoted position, providing an overall angular viewing range of ±40°, allowing users to view the bubble vial from various angles by being interference fit or clicked into multiple viewing positions, including a magnifying option.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed reflective surface is used in conventional spirit levels, then the structure is simple and manufacturing is easy, but the viewing angle is limited to ±5° directly opposite the level
Solution Approach 1:
The reflective surface is made movable rather than fixed, allowing it to be rotated about a pivot axis. This dynamic element enables the viewing angle to be adjusted from ±5° to ±40°, resolving the contradiction between ease of operation and device complexity by introducing a simple rotational mechanism.
Solution Approach 2:
The reflective surface is positioned at an angle (approximately 45°) to the bubble vial axis rather than being parallel to the viewing plane. This angular orientation in a different dimension allows light reflection to reach the user's eye from offset positions, expanding the effective viewing angle while maintaining a relatively simple structure.
2Ease of operation
If a fixed reflective surface at 45° angle is used, then users can view from offset positions, but the viewing angle is still limited compared to a fully adjustable system
Solution Approach 1:
The reflective surface is made rotatable about a pivot axis, transforming it from a static component to a dynamic one. This allows manual adjustment of the viewing angle while maintaining ease of manufacture through a simple pivot mechanism with interference fit or detent features.
Solution Approach 2:
The user manually adjusts the reflective surface to the desired viewing angle, and the interference fit or detent mechanism holds it in position without requiring additional actuators or complex control systems. The system serves itself by using the user's own action to achieve the desired configuration.
3Ease of operation
If an externally deployed reflective surface is used, then the viewing angle can be adjusted, but the arrangement is vulnerable and can only be used from a single side
Solution Approach 1:
The reflective surface is nested within a hollow portion of the spirit level body rather than being externally deployed. This protective enclosure shields the reflective surface from damage while still allowing it to rotate and function effectively, resolving the contradiction between viewing flexibility and structural vulnerability.
Solution Approach 2:
The hollow portion of the body acts as an intermediary protective structure between the external environment and the reflective surface. This intermediate enclosure provides mechanical protection while allowing optical functionality to proceed uninterrupted.
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
This design enables users to comfortably and efficiently set vertical surfaces over a wider range, enhancing usability by allowing viewing from offset positions and providing a ±40° angular range compared to conventional spirit levels.
Implementation Method 1
a reflective surface (37) inclined towards the bubble vial (32) and supporting means (34) for supporting the reflective surface member (36) about a pivot axis (38) disposed in the imaginary longitudinal plane (21) and subtending an acute included angle with the longitudinal bubble vial axis (28)
Data Source
AI summary
Wider overall angular viewing range for a spirit level achieved by provisioning spirit levels with a bubble vial module including a reflective surface wherein the reflective surface is manually pivotal about a pivot axis relative to a non-pivoted direct opposite viewing position such that a user can pivot the reflective surface towards himself. The system may include predetermined viewing positions.