Motion Detector Cover for Tool-Free Wall Adjustment
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Solution Overview
Problem
Existing motion detectors for home automation installations lack adjustability without tools or dismantling, have visible adjustment mechanisms, and protrude excessively from walls, compromising aesthetics and functionality.
Innovation Solution
A motion detector design with a built-in receiving body and a cover that integrates adjustment means, allowing parameter adjustment without tools or dismantling, while keeping the cover outside the detection zone to maintain aesthetics and prevent interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the device is affixed against the wall and completely protrudes, then the adjustment means are accessible, but the aesthetic appearance deteriorates and visual compatibility with recessed luminaires is lost
Solution Approach 1:
The device is segmented into a recessed body (embedded in the wall) and a protruding cover (containing the detection cell and adjustment means). This segmentation allows the bulk of the device to be hidden within the wall while only the essential functional parts protrude, resolving the contradiction between accessibility and aesthetic appearance.
Solution Approach 2:
The receiving body is nested within the wall structure, with only the cover portion protruding. This nesting approach minimizes the visual impact of the detector while maintaining functionality, as the main body is concealed within the wall cavity.
2Ease of manufacture
If a dome shape is used to house electronic components, then the device can be fixed to thin walls, but the volume protruding from the wall increases
Solution Approach 1:
The device separates the electronic components housing (receiving body) from the detection function (cover with detection cell). The receiving body can be flattened to fit thin walls, while the cover extends outward to perform detection, minimizing overall protruding volume while maintaining fixing capability to thin walls.
Solution Approach 2:
The detection function is moved to a different spatial dimension - the cover protrudes in one direction while the receiving body remains flush with or recessed from the wall surface. This dimensional separation allows the device to fix to thin walls without requiring a large protruding volume for housing electronics.
3Adaptability or versatility
If adjustment means are integrated in the front face, then adjustability is improved, but the adjustment means remain constantly visible
Solution Approach 1:
The cover is made movable relative to the receiving body, allowing it to be positioned in different states: covering the adjustment means when aesthetic appearance is prioritized, and exposing them when adjustment is needed. This dynamic positioning resolves the contradiction between constant visibility and aesthetic appearance.
Solution Approach 2:
The cover provides selective masking - it can be positioned to cover only the adjustment means area while leaving the detection cell opening clear. This local quality approach allows adjustment means to be integrated in the front face for adaptability, while their visibility is controlled locally by the movable cover position.
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 adjustable detection parameters without visible adjustment mechanisms and minimizes the detector's protrusion from the wall, enhancing user convenience and aesthetic compatibility.
Implementation Method 1
The movement detector comprises means for guiding the cover (2) in its movement relative to the rest of the movement detector (1), the guide means comprising a fixed part and a moving part, and directing said cover (2) in a movement preferably at least partially perpendicular to an axis of symmetry (3) of the detection zone (4)
Implementation Method 2
an optical part comprising a detection cell, the detection zone of which is delimited by an opening, at the level of a front face of the detector (1), covered by a part permeable to infrared rays (20)
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The detector (1) has a receiving body including a base and a lid (8). An optical part and an adjustment unit are integrated in a front face of the detector. A cover (2) is integrated in the front face of the detector, and is arranged between the base and the lid. The cover is connected to the lid such that the cover is not separated from the detector. The cover is assembled outside of a detection zone in movable manner, where a trace left by the cover is not intersected with the detection zone.