Slat Blind Switching Device with Rotational Magnet Trajectory
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Solution Overview
Problem
The existing switching devices for slat blind motor assemblies face malfunctions due to limited magnetic field variations between positions, leading to inaccurate detection and potential shocks during blind operation, especially with temperature changes.
Innovation Solution
The device transforms the relative movement of its second member into a trajectory with a rotational component for the magnet, altering the magnetic field's direction and intensity at the detector, allowing for precise position differentiation using a less precise detector, and includes a guide path with rectilinear and curved portions to manage movement and prevent jamming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a magnet moves in a straight line relative to a detector, then the device structure is simple, but the magnetic field variation at the detector is limited and may cause malfunctions
Solution Approach 1:
The magnet's movement is transformed from simple linear translation to a trajectory with rotational components. The magnet rotates around an axis that is not parallel to the translation axis of the second member, creating a more complex spatial path that significantly varies the magnetic field intensity at the detector position.
Solution Approach 2:
The orientation of the magnet's magnetic poles changes during movement. In the first position, a first pole faces the detector; in the second position, an opposite second pole faces the detector. This parameter change in pole orientation creates significant magnetic field variation for reliable detection.
2Reliability
If the magnet displacement distance is increased to improve field variation, then the blind rail length increases, but the device becomes larger and more complex
Solution Approach 1:
Instead of increasing linear displacement distance, the invention introduces rotational movement in another dimension. The magnet rotates around an axis not parallel to the translation axis, creating significant magnetic field variation through angular change rather than increased linear travel.
Solution Approach 2:
The invention changes the orientation parameter of the magnet during a limited displacement. By rotating the magnet so that opposite poles face the detector at different positions, significant field variation is achieved within a compact rail length.
3Reliability
If an accurate detector is used to avoid malfunctions, then detection precision improves, but the device cost and complexity increase
Solution Approach 1:
The magnet's pole orientation changes significantly during movement, with opposite poles facing the detector at different positions. This creates large variations in magnetic field intensity that are easily detectable even with less precise detectors, reducing the precision requirements for the detector.
Solution Approach 2:
The rotational component of the magnet's trajectory creates significant spatial distribution changes in the magnetic field lines. This dimensional change in movement pattern produces pronounced field variations that simplify detection requirements.
4Device complexity
If the magnet moves along a purely translational path, then the mechanism is simpler, but the magnetic field variation is insufficient for reliable detection
Solution Approach 1:
The magnet's trajectory combines translation with rotation around an axis not parallel to the translation axis. This adds a rotational dimension to the movement, creating significant variations in the spatial distribution of magnetic field lines and improving detection reliability.
Solution Approach 2:
The orientation of the magnet's magnetic poles changes during the combined translational and rotational movement. The rotation causes opposite poles to face the detector at different positions, creating significant magnetic field intensity variations that enable reliable detection.
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
This solution enables reliable detection and early motor stoppage with significant magnetic field variation, reducing the risk of shocks and improving operational accuracy with a simpler mechanism that minimizes assembly precision requirements.
Implementation Method 1
a magnet (27) intended to move during the relative movement of the second member (17) with respect to the first member (16), and a detector (28) of the field generated by the magnet (27)
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The device (12) has a magnet (27) generating a magnetic field for moving a detector (28) during a relative movement of a member (17) i.e. base, with respect to another member (16) i.e. button, between two positions of the device. A transformation unit (29) transforms the relative movement of the former member relative to the latter member to another relative movement of the magnet relative to the detector along a path. The path comprises a rotational component that rotates between the two positions of the device.