Rotary Pulse Switch Electrode Segmentation for Static Discharge Prevention
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Solution Overview
Problem
Rotary type pulse switches suffer from static electricity accumulation on the movable electrode, leading to potential electrostatic discharge damage to connected electrical components during rotation.
Innovation Solution
The design incorporates a movable electrode with contacting portions and a fixed electrode with multiple patterns, ensuring a full insulation state during rotation to prevent static electricity accumulation, and includes grounding means to release static electricity during this state, thereby reducing the risk of electrostatic discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the movable electrode constantly contacts the common fixed electrode pattern during rotation, then rotation information can be detected continuously, but static electricity accumulates on the movable electrode causing potential damage to electrical components
Solution Approach 1:
The common fixed electrode pattern is divided into multiple contacted portions arranged at different angular positions around the rotation locus. This segmentation allows the movable electrode to contact only specific portions during rotation, creating intervals where no contact occurs, thereby preventing continuous static electricity accumulation while maintaining detection capability through the distributed contacted portions
Solution Approach 2:
The electrode patterns are arranged to create periodic contact and insulation states during rotation. The movable electrode alternates between contacting the fixed electrode patterns and being in full insulation state, with the insulation state occurring at regular angular intervals. This periodic insulation allows static electricity to be released periodically, preventing dangerous accumulation while the periodic contact states enable continuous rotation detection
2Object-affected harmful factors
If the contacted portions are arranged to create full insulation state during rotation, then static electricity accumulation is prevented, but conduction between electrodes must be interrupted
Solution Approach 1:
The fixed electrode is segmented into multiple contacted portions distributed around the rotation locus rather than forming a continuous pattern. This segmentation creates discrete contact zones separated by insulation zones, allowing the movable electrode to experience periodic full insulation states while still maintaining overall detection functionality through the distributed contacted portions
Solution Approach 2:
Different regions of the fixed electrode have different functional qualities: some contacted portions are positioned to enable detection of rotation direction and amount, while others are positioned to create full insulation states for static electricity prevention. The local arrangement of contacted portions is optimized to simultaneously achieve both detection reliability and static electricity prevention
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 configuration ensures required conduction between the electrodes while preventing static electricity buildup, minimizing the risk of damage to connected electrical components from electrostatic discharge.
Implementation Method 1
the movable electrode constantly picks up static electricity during the rotation. When the movable electrode is charged with static electricity, the static electricity will enter varied electrical components electrically connected to the movable electrode and fixed electrode. The electrical components can be damaged by electrostatic discharge.
Data Source
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AI summary
A rotary type pulse switch includes a movable electrode 57 having a plurality of contacting portions 57A formed in positions of the same radius from its rotation center, and a fixed electrode 50 disposed face to face with the movable electrode 57 and having a plurality of contacted portions 60 arranged in form of stepping stones on the same circumference as a rotation locus T of the contacting portions 57A. The fixed electrode 50 includes a first fixed electrode pattern 52A, a second fixed electrode pattern 52B and a common fixed electrode pattern 51, each of the fixed electrode patterns 51, 52A, 52B being in a mutually nonconductive state. The contacted portions 60 are arranged in such a positional relationship that a full insulation state occurs during rotation of the movable electrode 57 in which none of the contacting portions 57A contact the first fixed electrode pattern 52A, second fixed electrode pattern 52B or common fixed electrode pattern 51.