Flexible Finger-Wearable Haptic Feedback Device Using Magnetic Transmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional haptic feedback devices are often fixed and restrictive, limiting natural and comfortable human-computer interaction, especially in wearable applications where flexibility and portability are essential for immersive experiences.
Innovation Solution
A flexible finger-wearable haptic feedback device comprising a system of sleeves and elastic transmission rods with push-pull mechanisms and pressure sensors, allowing for natural finger movement while providing haptic feedback through spring steel sheets and soft rubber connectors, enabling closed-loop control for precise force application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional haptic feedback device is fixed on a desktop, then force feedback can be provided to the user, but the device constraints hand motion and reduces portability
Solution Approach 1:
The patent replaces traditional mechanical linkages with magnetic field interaction. Permanent magnets in the driving assembly interact with magnetic strips on the transmission rod to provide force feedback, eliminating complex mechanical connections and enabling wireless, portable operation while maintaining reliable haptic feedback
Solution Approach 2:
The patent uses a flexible transmission rod with magnetic strips instead of rigid mechanical linkages. This flexible structure allows natural hand motion while transmitting force feedback, resolving the contradiction between portability and reliable force delivery
2Adaptability or versatility
If a wearable haptic feedback device is worn on a limb, then portability and natural interaction are improved, but the device may not provide sufficient force feedback
Solution Approach 1:
The patent employs a dynamic driving assembly with adjustable permanent magnets that can be positioned to optimize magnetic field strength. The transmission rod with magnetic strips dynamically transmits force along the finger, providing sufficient haptic feedback while maintaining wearability and natural motion
Solution Approach 2:
The patent combines magnetic strips with flexible transmission rod material to create a composite structure that both transmits force effectively and maintains flexibility for natural hand motion, resolving the contradiction between force strength and portability
3Force
If a rigid transmission structure is used, then force feedback is transmitted effectively, but finger movement flexibility is reduced
Solution Approach 1:
The patent uses a flexible transmission rod with embedded magnetic strips instead of rigid linkages. This flexible structure naturally conforms to finger movement while the magnetic interaction maintains effective force feedback transmission, eliminating the need for rigid mechanical connections
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 offers minimal constraint on finger movement, accurate haptic feedback, and adaptability to different finger sizes and shapes, enhancing immersion and realism in virtual environments with a compact and natural interactive design.
Implementation Method 1
an outer transmission rod 4 having bending elasticity arranged on a back of the finger, and an inner transmission rod 5 having bending elasticity arranged on a pad of the finger
Implementation Method 2
The fingertip sleeve is provided with a first contact pressure sensor connected with the end of the outer transmission rod, the fingertip sleeve is provided with a second contact pressure sensor connected with an end portion of the inner transmission rod
Data Source
AI summary
A flexible finger-wearable haptic feedback device includes a fingertip sleeve sheathing a distal phalanx of a finger, a middle sleeve sheathing a middle phalanx of the finger, a proximal sleeve sheathing a proximal phalanx of the finger, outer and inner transmission rods having bending elasticity. The outer transmission rod is fixed on the fingertip sleeve at one end, positioned at a back of a hand at the other end and connected with an outer driver. The inner transmission rod is fixed on the fingertip sleeve at one end, positioned at a palm at the other end and connected with an inner driver. The fingertip sleeve is provided with first and second contact pressure sensors respectively connected with the ends of the outer and inner transmission rods, and an inner wall of the fingertip finger sleeve contacting the finger is provided with a film pressure sensor.