Force Feedback Device Using Linear Vibration Motor
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing force feedback devices have complex structures and assembly processes due to the need for converting rotating forces into linear directional forces, resulting in poor feedback control effects and limited ability to provide forces in two opposite directions.
Innovation Solution
A force feedback device with a simple structure that uses a linear vibration motor to drive a button to rotate clockwise and anticlockwise through a driving arm, eliminating the need for a transmission structure like a worm wheel and gear, and allowing for bidirectional forces to be applied directly to the button.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a worm wheel and gear transmission structure is used to convert rotating force into linear directional force, then the force feedback device can achieve unidirectional force application, but the structure becomes complex and assembly becomes difficult
Solution Approach 1:
The patent extracts and eliminates the complex worm wheel and gear transmission structure from the force feedback device. By directly connecting the linear vibration motor to the button assembly, the invention removes the intermediate transmission components while maintaining the essential force application capability, thereby simplifying the overall structure and easing assembly.
Solution Approach 2:
Instead of using a rotating motor with mechanical transmission components to generate linear force, the invention inverts the approach by using a linear vibration motor that directly generates linear directional force without requiring rotation-to-linear conversion mechanisms. This fundamental inversion eliminates the need for worm wheels and gears.
2Force
If force is amplified through gear deceleration, then the driving force increases, but the rotation speed of the trigger decreases resulting in poor feedback control effect
Solution Approach 1:
The patent replaces the mechanical gear deceleration system with a linear vibration motor that directly generates controlled linear force. This substitution eliminates the trade-off between force amplification and speed reduction inherent in gear systems, as the linear motor can independently control both force magnitude and response speed through electrical parameters.
Solution Approach 2:
The invention changes the operating parameters from rotational motion with mechanical gear ratios to linear vibration motor parameters such as vibration frequency and amplitude. By controlling these electrical and vibrational parameters, the system achieves both sufficient driving force and rapid response without the speed loss associated with mechanical deceleration.
3Device complexity
If a linear vibration motor is used to directly drive the button, then the structure is simplified and assembly is easier, but the ability to provide bidirectional forces must be ensured
Solution Approach 1:
The patent employs a linear vibration motor that inherently possesses dynamic bidirectional capability. By controlling the phase and direction of the vibrational force, the motor can push the button in either direction along its linear path, providing the necessary bidirectional force application without requiring additional mechanical components or complex control mechanisms.
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 device achieves a larger stroke and quicker response with a simpler structure, providing a better user experience and easier assembly, while effectively simulating bidirectional forces without the complexity of traditional designs.
Implementation Method 1
the driving assembly includes a linear vibration motor and an output shaft extending from the linear vibration motor; the output shaft is connected to one end of the driving arm away from the button; and the linear vibration motor drives the output shaft to do linear back-and-forth motion along a vibration direction of the linear vibration motor
Data Source
AI summary
A force feedback device includes a fixed portion, a button hinged to the fixed portion, an driving arm connected to a bottom of the button, and a driving assembly connected to one end of the driving arm away from the button; the fixed portion includes a fixed portion body and a bearing mounted at one end of the fixed portion body; the button includes a button body and a rotating shaft formed by protruding from one end of the button body; the driving arm is connected to a bottom of the button body; the driving assembly includes a linear vibration motor and an output shaft extending from the linear vibration motor; The force feedback device of the present invention can achieve a force feedback effect of a button, has a simple structure and good experience, and is easy to assemble.