Door Switch Visibility via Radial Display and Light Diffusion
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Solution Overview
Problem
Existing door switch configurations face challenges in improving visibility of the light-emitting state due to the potential hiding of light-emitting parts by signal transmitting devices, especially when the sensor and actuator are oppositely positioned, making it difficult to confirm the switch state from any direction.
Innovation Solution
A door switch design where the display part is positioned non-overlapping with the actuator, formed annularly along the sensor's outer edge, and includes a light guide to diffuse light uniformly, with a cover part to prevent uneven light emission, ensuring visibility from any direction and facilitating easy recognition of the switch state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sensor and actuator are positioned opposite to each other in a normal state, then the door switch can detect the door state accurately, but the light-emitting part of the sensor may be hidden by the actuator, making visibility difficult to improve
Solution Approach 1:
The display part is designed to extend in a direction different from the normal line between the sensor and actuator, specifically protruding in the radial direction of the actuator. This dimensional change allows the display part to be visible from the side even when the sensor and actuator are positioned opposite to each other, resolving the contradiction between accurate door state detection and visibility of the light-emitting state.
2Illumination intensity
If the display part is positioned to not overlap the actuator, then visibility of the light-emitting state is improved, but the sensor and actuator cannot be positioned in the most compact opposite configuration
Solution Approach 1:
The display part extends in the radial direction of the actuator rather than along the normal line, utilizing a different spatial dimension. This allows the sensor and actuator to maintain their compact opposite configuration for accurate detection while the display part protrudes sideways to avoid overlap and improve visibility, thus resolving the contradiction between visibility improvement and device complexity.
3Illumination intensity
If a light guide part is added to diffuse light from the light source, then uniform light emission is achieved, but the device structure becomes more complex
Solution Approach 1:
The light guide part is integrated into the display part structure, merging two functions (light guidance and display) into a single component. This reduces the number of separate parts and simplifies the overall device structure while still achieving uniform light emission through the light guide's diffusing effect.
Solution Approach 2:
The display part is designed to serve multiple functions: it displays the light-emitting state, guides light from the light source, and provides structural support. This multi-functionality reduces the need for separate dedicated light guide components, thereby reducing device complexity while maintaining uniform light emission.
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 design enhances visibility of the light-emitting state, allowing reliable detection of the door's open or closed state from any position, improving the overall recognition of the door's status.
Implementation Method 1
the light guide part can diffuse light and allow the display part to emit light uniformly
Implementation Method 2
the cover part can hide locally bright parts and reduce unevenness of light emission
Implementation Method 3
light can be further diffused and the display part can be made to emit light uniformly
Data Source
Figure 1
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AI summary
The disclosure provides a door switch (1) that improves visibility. The door switch includes an actuator (20) and a sensor (10). In addition, the door switch is installed so that when a door is closed, a surface (S1) of the sensor and an opposite surface (S2) of the actuator are in contact with or close to each other, and when the door is open, the surface of the sensor and the opposite surface of the actuator are separated from each other. The actuator outputs a detection signal. A display part (110) for indicating a reception state of the detection signal is formed on the surface of the sensor. The surface of the sensor has a non-opposite region (R1), wherein the non-opposite region (R1) is at least a part of the display part (110) not opposite to the opposite surface of the actuator in the reception state.