Finger-Worn Vibration Layout for Illusory Force Feedback
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Solution Overview
Problem
Existing illusionary force sense presentation apparatuses restrict hand movement by requiring the user to grasp a housing, limiting the ability to perform other actions.
Innovation Solution
An illusionary force sense presentation apparatus with three vibration devices, each fitted on different fingers (thumb, index finger, and little finger), controlled by a controller to generate various vibration patterns that allow for illusionary force senses without restricting hand movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the user grasps the housing to perceive illusionary force sense, then the illusionary force sense can be effectively presented to the user, but the user's hand movement is restricted and the user cannot perform other actions with the hand
Solution Approach 1:
The housing is divided into multiple independent gripping portions positioned at different locations. The user can grasp one gripping portion with each finger, allowing independent control of multiple fingers while maintaining hand movement freedom. This segmentation enables the illusionary force sense to be presented to multiple fingers simultaneously without requiring the entire hand to be fixed.
Solution Approach 2:
Multiple gripping portions act as intermediaries between the housing and the user's fingers. Instead of requiring direct grasping of the entire housing, the user interacts with these distributed gripping portions through finger movements, which serves as a mediator that maintains both force sense presentation and hand mobility.
2Ease of operation
If multiple vibration devices are placed on different fingers, then hand movement freedom is maintained, but the device complexity increases
Solution Approach 1:
Multiple vibration devices are integrated into a single housing structure with multiple gripping portions. The vibration bodies are positioned within the housing to correspond with different gripping portions, allowing multiple fingers to receive vibration feedback simultaneously from one unified device rather than requiring separate devices for each finger.
Solution Approach 2:
The housing serves multiple functions: it houses multiple vibration bodies, provides multiple gripping portions for different fingers, and acts as a unified structure that coordinates the vibration of multiple fingers. This multi-functionality reduces the need for separate devices while maintaining hand movement freedom.
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
Enables the user to experience a variety of illusionary force senses while maintaining freedom of hand movement, allowing for simultaneous interaction with other objects.
Implementation Method 1
the vibration body vibrates in a specific pattern with the user grasping the housing
Data Source
AI summary
An illusionary force sense presentation apparatus is provided that includes a first vibration device, a second vibration device, a third vibration device, and a controller. Each of the vibration devices includes a housing, a vibration body, and a wearing part. The first vibration device is fitted on a thumb of a user. The second vibration device and the third vibration device are fitted on any two fingers of the user other than the thumb, respectively. The controller has a mode of controlling the second vibration device and the third vibration device with the user opening a hand and a mode of controlling the first vibration device and the second vibration device with the user making a hand rounded.