Heat Detector Guard Integration for Compact, Visible Indicator Lamps
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Solution Overview
Problem
Existing heat detectors require a larger mounting board due to the separate positioning of the indicator lamp and detection portion, restricting the arrangement of the light source device.
Innovation Solution
The indicator lamp's visible portion is positioned inside the guard structure and around the detection portion, allowing the light source device to be closer to the detection portion, thus miniaturizing the mounting board and reducing arrangement restrictions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the indicator lamp is disposed outside the guard structure in plan view, then the LED and detection portion can be electrically connected to the mounting board, but the mounting board needs to be increased in size and the arrangement of the LED is restricted
Solution Approach 1:
The patent merges the indicator lamp with the guard structure by positioning the visible portion of the indicator lamp inside the guard structure in plan view. This integration allows the LED to be arranged close to the detection portion without requiring a larger mounting board, as both components share the same protected space within the guard structure.
Solution Approach 2:
The visible portion of the indicator lamp is nested within the guard structure, utilizing the space inside the guard structure for dual purposes: protection of the detection portion and display of the indicator lamp. This nesting eliminates the need for separate external positioning of the indicator lamp.
2Reliability
If the indicator lamp is disposed outside the guard structure in plan view, then the LED can be electrically connected to the mounting board, but the arrangement of the light source device is restricted
Solution Approach 1:
By combining the indicator lamp with the guard structure, the patent enables flexible arrangement of the LED within the protected space. The LED can be positioned at various locations inside the guard structure close to the detection portion, providing arrangement flexibility that was not available when the indicator lamp was required to be outside.
3Area of stationary object
If the visible portion is disposed inside the guard structure, then the mounting board can be miniaturized, but the visibility of the indicator lamp may be reduced
Solution Approach 1:
The patent applies local quality by making the visible portion of the indicator lamp transparent or translucent, allowing light to pass through while maintaining the compact structure inside the guard structure. This enables the indicator lamp to be visible from the monitoring area side despite being positioned inside the guard structure.
Data Source
AI summary
A heat detector (1) includes: a detection portion (2) which is exposed to a monitoring area (12) and detects heat; a guard structure (7) which is provided around the detection portion (2) and protects the detection portion (2) from an external force on the side of the monitoring area (12); and an indicator lamp (4) which performs a display relating to the heat detector, wherein in the indicator lamp (4), at least a part includes a planar visible portion (42) inside the guard structure (7) and around the detection portion (2) and at least a part of the visible portion (42) is visible from the side of the monitoring area (12) over the guard structure (7).