Electromagnetic Trigger Force Feedback With Bidirectional Actuation
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Solution Overview
Problem
Existing force feedback apparatuses in human-computer interaction devices are complex in assembly, require conversion of rotating force to linear force, and can only provide force in one direction, affecting timeliness and user experience.
Innovation Solution
A force feedback apparatus with a housing, rotation shaft, and trigger, utilizing a driving magnet, iron core, and driving coil for direct force feedback generation, along with a reset spring and damping magnets to enable bidirectional force application and simplified assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a motor driving a worm and gear is used to convert rotating force to linear force, then force feedback is achieved, but the assembly becomes complicated and the structure is complex
Solution Approach 1:
The patent extracts and removes the complex transmission mechanism (worm and gear) from the force feedback system, retaining only the essential electromagnetic actuation components (motor and trigger) to achieve force feedback directly without mechanical conversion elements
Solution Approach 2:
The patent replaces the mechanical transmission system (worm and gear for force conversion) with a direct electromagnetic actuation system, where the motor directly drives the trigger to eliminate the need for mechanical force conversion mechanisms
2Force
If a worm and gear conversion mechanism is used, then rotating force is converted to linear force, but the force can only be applied in one direction
Solution Approach 1:
The patent implements a dynamic force feedback system where the motor can reversibly drive the trigger in both directions (forward and backward), eliminating the need for unidirectional mechanical conversion mechanisms like worm and gear and enabling bidirectional force application
3Force
If a reduction gear is used to amplify motor force, then force is increased, but the rotational speed of the trigger is reduced
Solution Approach 1:
The patent extracts and removes the reduction gear from the system, accepting the trade-off of reduced force amplification in exchange for maintaining high trigger rotational speed and responsiveness, prioritizing speed over force multiplication
Solution Approach 2:
The patent eliminates the intermediate force conversion stage (reduction gear) to allow the motor to directly and rapidly actuate the trigger, rushing through the force application process without mechanical conversion delays to improve responsiveness
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 solution provides timely and bidirectional force feedback, enhancing user experience by simplifying the structure and assembly process while enriching the force feedback mode.
Implementation Method 1
The driving coil is energized to interact with the driving magnet to generate force feedback on the trigger
Implementation Method 2
the at least one damping magnet is spaced from the driving coil and arranged at a peripheral side of the driving coil
Data Source
AI summary
Provided is a force feedback apparatus, including a housing, a rotation shaft fixed to the housing, a trigger movably connected to the rotation shaft and movable relative to the housing, and a force feedback assembly. The force feedback assembly includes a driving magnet fixed to a side of the trigger toward the housing, an iron core fixed to the housing and arranged opposite to the driving magnet, and a driving coil wound around the iron core. The driving coil is energized to interact with the driving magnet to generate force feedback on the trigger. The force feedback apparatus requires no additional transmission structure and directly provides force feedback through interaction between two driving elements, thereby realizing timely force feedback on the trigger and reducing the assembly difficulty while simplifying the structure. In addition, forces in two directions can be directly generated on the trigger by changing a driving current.