Rotary Knob Light Guide Structure for Uniform Multi-Directional Emission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional rotary knob switches have a fixed design and limited light-emitting capabilities, making them inflexible and difficult to observe from all directions, and their manufacturing is complex due to the need for precise grooves in light-conductive components.
Innovation Solution
A rotary knob switch with a light guide reflection structure that includes a light-emitting top surface, a light-incident bottom surface, and a light-emitting side surface, featuring a main reflection slope and a secondary reflection area, which disperses light uniformly across the knob head, reducing material complexity and manufacturing costs while enhancing visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light-conductive guide component with grooves is used to achieve uniform light emission in multiple directions, then the light emission effect is improved, but the manufacturing complexity increases
Solution Approach 1:
The light guide reflection structure is divided into multiple functional surfaces: a light incident surface for receiving light, a light emitting surface for directing light outward, and a side surface for lateral light distribution. This segmentation allows each surface to be optimized independently for its specific function, achieving uniform multi-directional light emission while simplifying the overall manufacturing process compared to complex groove structures.
Solution Approach 2:
The patent transitions from a conventional single-surface light guide to a three-dimensional light guide reflection structure with distinct incident, emitting, and side surfaces. This dimensional expansion enables light to be distributed uniformly in multiple directions (upward, lateral, and forward) simultaneously, resolving the contradiction between light emission quality and manufacturing complexity.
2Ease of operation
If traditional single-point local light-emitting is used, then the structure is simple, but the observability from all directions is poor
Solution Approach 1:
Different surfaces of the light guide structure are assigned different functional qualities: the light incident surface receives light, the light emitting surface directs light upward and forward, and the side surface distributes light laterally. This local quality differentiation enables the structure to emit light uniformly in multiple directions, significantly improving observability from all angles while maintaining reasonable structural complexity.
3Manufacturing precision
If precise grooves are formed in the light-conductive guide component, then light direction control is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent extracts the light direction control function from complex internal groove structures and implements it through the geometric configuration of the light guide reflection structure's surfaces. By taking out the need for precise internal grooves and replacing them with externally visible surface geometries, the manufacturing precision requirements are reduced while maintaining effective light direction control.
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
The solution provides a simpler, more reliable structure for uniform light emission across multiple directions, improving user observation and reducing manufacturing complexity while maintaining effective light distribution.
Implementation Method 1
the inner side surface of the light guide reflection structure comprises a main reflection slope for the first reflection of light from the light guide column
Implementation Method 2
the light guide reflective structure further comprises a hollow hole for the secondary reflection of a least a portion of the light reflected by the main reflection slope
Data Source
AI summary
A rotary knob switch can include: a knob head; a fixing mount disposed below the knob head and configured to allow at least a portion of the bottom of the knob head to pass through it; cam located at the bottom of the fixing mount and to be mated with the bottom of the knob head, a side of the cam forming at least one protruding control curved surface; and a slider, said slider being coaxial with the cam, ramp with different heights being provided along edge of the slider, wherein, when the cam rotates, the control curved surface of the cam presses the ramp of the slider, such that the slider slides along axial direction towards the bottom of the rotary knob switch, the knob head comprises an indicator block, the lower part of the indicator block is provided with an axial light guide column.