Force Sense Device with Movable Finger Ring
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Solution Overview
Problem
The existing force sense presentation devices are ineffective when the user's forefinger size does not match the inner diameter of the ring, leading to poor hand fixation and usability issues.
Innovation Solution
A force sense presentation device with a base body gripped by the user and a movable unit that includes a finger placement portion with a curved finger engagement portion, allowing the forefinger to be placed securely, and a moving mechanism that moves the movable unit relative to the base body, enabling proper grip and force sense presentation regardless of finger size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a ring is fixed to the base body for gripping, then the device can present proprioceptive sensitivity to the fingers, but the hand cannot be fixed well when the forefinger size does not match the inner diameter of the ring
Solution Approach 1:
The ring is made movable relative to the base body, allowing it to adjust its position dynamically. This enables the ring to adapt to different forefinger sizes while maintaining secure hand fixation, resolving the contradiction between reliability and adaptability.
Solution Approach 2:
The inner diameter of the ring is made changeable through the movable mechanism. By adjusting the ring's position or size parameter, the device can accommodate various finger dimensions while maintaining proper grip and fixation.
2Adaptability or versatility
If the ring is made adjustable to fit different finger sizes, then finger size compatibility improves, but the device structure becomes more complex
Solution Approach 1:
A simple movable ring mechanism is used instead of a complex adjustable structure. The ring can move relative to the base body through a straightforward mechanical linkage, achieving adaptability without significantly increasing device complexity.
Data Source
AI summary
A force sense presentation device 1 includes a base body 2 that is gripped by a hand of a user, a movable unit 3 having a finger placement portion 5 on which the user is to place a fingertip in a state in which the base body 2 is gripped by the user, and a moving mechanism that moves the movable unit 3 with respect to the base body 2. The base body 2 is held by two or more fingers. The finger placement portion 5 has a finger engagement portion 4 provided thereon uprightly in a direction different from a moving direction of the movable unit 3.