Disaster Prevention Detector Side Light Guides for Test Visibility
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Solution Overview
Problem
Existing fire detectors with indicator lights are obscured during tests, making it difficult to identify test information when the detector is partially covered by a test jig.
Innovation Solution
The disaster prevention apparatus includes an outer cover with indicators, such as light guides or thin portions, that expose part of their indication surfaces even when covered by a test apparatus, ensuring visibility of test information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the detector is covered with a test jig to perform heat application test, then the test function is achieved, but the indicator light becomes hidden and test information cannot be identified
Solution Approach 1:
The indicator is configured to emit light not only in the vertical direction (upward through the outer cover) but also in horizontal directions (sideways through side surfaces). This multi-directional light emission ensures that when the detector is covered by a test jig from above, the indicator remains visible from the side, preventing information loss during testing.
2Ease of operation
If the indicator is positioned on the top surface of the outer cover, then it is easily visible during normal operation, but it becomes obscured when the detector is covered by a test apparatus
Solution Approach 1:
Different portions of the outer cover are designed with different optical properties. The top surface allows light transmission for normal visibility, while specific side surface portions are designed to transmit indicator light during testing. This local differentiation ensures the indicator remains visible from appropriate directions depending on the operational state.
Solution Approach 2:
The indicator emits light in multiple spatial dimensions - vertically upward for normal operation and horizontally sideways for test operation. This multi-dimensional light emission strategy ensures visibility regardless of whether the detector is covered by a test apparatus or not.
3Reliability
If a cylindrical test jig is used to cover the detector during testing, then heat application is effective, but the indicator light position is blocked making test results unobservable
Solution Approach 1:
By configuring the indicator to emit light in horizontal directions in addition to vertical directions, the system overcomes the blockage caused by cylindrical test jigs. The side surface light emission provides an alternative observation path that bypasses the top-covering test apparatus, enabling test result detection without compromising test accuracy.
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 reliable identification of test information despite partial coverage by the test jig, improving design flexibility and reducing component count.
Implementation Method 1
an indicator that outputs at least information about a test of the disaster prevention apparatus by emitting light
Data Source
AI summary
A detector 100 includes: an outer cover 11; and an indicator that outputs at least information about a test of a disaster prevention apparatus by emitting light, and that is provided in the outer cover 11, wherein when at least a part of the outer cover 11 is covered with a test apparatus in order to perform the test of the detector 100, at least a part of an indication surface of the indicator is exposed to an outside of the test apparatus and the indicator is formed in a side portion of the outer cover 11, the indicator is formed in an edge portion of a front portion of the outer cover 11, and the indicator is a part of a light guide portion 111 that is formed in the outer cover 11, and that guides light from a light emitter.