Asymmetric Rotary Reluctance Trigger Feedback With Programmable Torque
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Solution Overview
Problem
Existing input devices, such as touch panels and screens, lack the tactile feedback of mechanical devices, making it difficult for users to confirm input application and detracting from the realism and enjoyment of input operations.
Innovation Solution
A torque feedback mechanism using a rotary reluctance motor with asymmetric poles, which provides programmable torque feedback by magnetizing the cores at different angular rotations, simulating the feel of mechanical triggers or levers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If virtual input devices (touch panels, touch screens) are used to replace mechanical input devices, then the device complexity is reduced and the price is lowered, but the tactile feedback and realism are lost
Solution Approach 1:
The patent replaces the mechanical spring system with an electromagnetic actuator system. The actuator uses electromagnetic fields to generate force feedback, eliminating the need for complex mechanical springs while maintaining the tactile feedback function. This substitution reduces device complexity and allows for programmable torque profiles.
Solution Approach 2:
The patent changes the physical parameters of the input device by introducing an electromagnetic actuator that can dynamically adjust torque characteristics. By controlling electrical parameters (current, voltage, frequency) to the actuator, the system can simulate different mechanical spring characteristics without physical mechanical components, enabling programmable torque feedback.
2Ease of operation
If physical input devices with mechanical components (springs, levers, hammers) are used to maintain tactile feedback, then the realism and tactile feel are improved, but the device complexity increases and manufacturing cost rises
Solution Approach 1:
The patent replaces mechanical springs and levers with an electromagnetic actuator that generates force through electromagnetic fields. This eliminates complex mechanical linkages, reducing device complexity while maintaining tactile feedback. The actuator can be controlled programmatically to simulate various mechanical characteristics.
Solution Approach 2:
The electromagnetic actuator serves multiple functions: it provides tactile feedback, simulates different spring characteristics, and enables programmable torque profiles. This single component replaces multiple mechanical elements (springs, levers, dampers) that would otherwise be needed to achieve the same functionality.
3Ease of operation
If mechanical springs are used to provide torque feedback, then the tactile feedback is provided, but the torque profile is fixed and cannot be modified
Solution Approach 1:
The patent transitions from a static mechanical spring system to a dynamic electromagnetic actuator system. The actuator can dynamically adjust its torque output in real-time based on programmed parameters, allowing the torque profile to change during operation. This enables different tactile feedback characteristics to be delivered for different input scenarios.
Solution Approach 2:
The patent changes the physical parameters of the input device by introducing an electromagnetic actuator that can dynamically adjust torque characteristics. By controlling electrical parameters (current, voltage, frequency) to the actuator, the system can simulate different mechanical spring characteristics without physical mechanical components, enabling programmable torque feedback.
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
The mechanism offers customizable torque feedback that closely mimics the experience of mechanical devices, enhancing user interaction by providing clear feedback and realistic simulation.
Implementation Method 1
rotary reluctance motor with asymmetric poles
Implementation Method 2
the cores are magnetized at different angular rotations of the trigger or lever, creating a torque feedback profile
Data Source
AI summary
A torque feedback mechanism for a trigger or lever using a rotary reluctance engine is disclosed. In some examples, the rotary reluctance engine includes two fixed asymmetric core/coil assemblies located on one or both sides of a permanent magnet. In some examples, the core/coil assemblies are fixed in place, and the permanent magnet is coupled to the trigger or lever such that the magnet rotates with respect to the core/coil assemblies as the trigger or lever is squeezed. When the coils of the engine are programmably energized, the cores are magnetized at different angular rotations of the trigger or lever, creating a torque feedback profile that can be quickly modified to provide more or less torque at different angular displacements during the squeezing of the trigger or lever to emulate different triggers or levers.