Fingertip Haptic Ring Structure for Precise Force Feedback
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Solution Overview
Problem
Current haptic feedback devices primarily focus on medium to large force feedback applications for upper and lower limbs, with limited availability for fingertips, which require higher rigidity and dynamic performance due to delicate operations and strong grip mobility.
Innovation Solution
A haptic feedback device featuring a first feedback apparatus with a fixed platform, a power unit, a movable platform, and a ring, where the power unit drives the movable platform to move relative to the fixed platform, controlling the ring to provide feedback force and reaction force, thus enabling accurate force feedback to the user's finger.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If haptic feedback devices are designed for medium or large force feedback applications, then they can provide sufficient force for upper limbs and lower limbs, but they cannot meet the high rigidity and dynamic performance requirements for fingertip applications
Solution Approach 1:
The haptic feedback device is segmented into distinct functional modules: a drive mechanism for force generation, a transmission mechanism for motion transfer, and a wearable structure for fingertip mounting. This segmentation allows each module to be optimized independently - the drive mechanism provides sufficient force while the transmission mechanism ensures high rigidity and dynamic performance for delicate fingertip operations
Solution Approach 2:
The device employs local quality by providing different mechanical properties at different locations - the drive mechanism area is designed for force generation with appropriate compliance, while the fingertip interface area is designed with high rigidity and precise positioning capability to meet the specific requirements of delicate operations
2Volume of moving object
If haptic feedback devices are made compact for fingertip application, then they can be worn on fingers, but they may lack the power and force feedback capability needed for delicate operations
Solution Approach 1:
The device structure implements nesting by placing the power unit and transmission components within a compact, layered arrangement that fits on the fingertip. The drive mechanism is nested within the wearable structure, allowing high power density while maintaining a small overall volume suitable for finger mounting
Solution Approach 2:
The transmission mechanism incorporates dynamic elements that allow the compact structure to deliver high peak forces when needed while maintaining maneuverability. The system can dynamically adjust its mechanical impedance to provide both compact form factor and sufficient power for delicate operations
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 provides precise force feedback to the fingertips, enhancing the sense of presence and realism in virtual interactions and remote control operations, while achieving good rigidity and dynamic performance.
Implementation Method 1
a power unit disposed on the fixed platform and connected to the movable platform. The power unit is configured to obtain a first control signal generated by a controller and output torsion according to the first control signal
Implementation Method 2
The ring is configured to provide feedback force as the movable platform moves, to implement haptic feedback
Data Source
AI summary
A haptic feedback device includes: a first feedback apparatus, including: a fixed platform, a movable platform, a ring disposed on the movable platform, and a power unit disposed on the fixed platform and connected to the movable platform. The power unit is configured to obtain a first control signal generated by a controller and output torsion according to the first control signal. The movable platform is configured to be driven by the torsion to move relative to the fixed platform. The ring is configured to provide feedback force as the movable platform moves, to implement haptic feedback.