Smart Wearable Hinge Mechanism with Overrunning Clutch

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Solution Overview

Problem

Current VR and AR technologies fail to provide a realistic sense of gripping and holding virtual objects of different sizes, resulting in an artificial experience due to limited utility in simulating sensory perception.

Innovation Solution

A smart wearable apparatus with a rigid body, hinge mechanisms, and an overrunning clutch system that allows controlled pivoting to mimic the grip of various-sized objects, using a glove-like design with hinge mechanisms at hand joints and a clutch system to simulate the sensation of gripping and holding virtual objects.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a single-size controller is used for gripping virtual objects, then the device structure is simple, but the adaptability to objects of different sizes is poor

Engineering Contradiction:
Improveadaptability to objects of different sizesVSAvoiddevice structure
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies dynamics by making the controller's gripping structure adjustable and adaptable. The controller includes multiple fingers with adjustable curvature and positioning mechanisms, allowing the gripping structure to dynamically change its shape and size to match different virtual objects. This transforms a static, single-size controller into a dynamic, multi-configurable device that can adapt to various object dimensions while maintaining reasonable structural complexity through modular design.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent implements parameter changes by varying the curvature radius, finger length, and gripping force parameters of the controller's fingers. The system can adjust these parameters in real-time based on the detected virtual object characteristics, enabling the same controller hardware to simulate gripping objects of different sizes and shapes. This approach improves adaptability without requiring multiple physical controllers.

Inventive Principle:
Principle #35Parameter changes

2Adaptability or versatility

If haptic feedback devices simulate tactile sense through fixed concave and convex points, then the manufacturing is simplified, but the ability to simulate objects with different sizes and textures is limited

Engineering Contradiction:
Improveability to simulate objects with different sizesVSAvoidstructure of haptic feedback device
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies segmentation by dividing the haptic feedback surface into multiple independent or semi-independent concave and convex points that can be individually adjusted. Instead of a fixed pattern, each haptic element can be positioned and sized independently to match the local characteristics of the virtual object being simulated. This segmented approach enables the device to represent objects of different sizes and textures by activating and configuring specific haptic segments according to the virtual object's geometry.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The haptic feedback device incorporates dynamics by making the concave and convex points adjustable in position, size, and depth. The system can dynamically reconfigure the haptic surface topology in real-time based on the virtual object's properties, transforming a static haptic array into an adaptive surface that mirrors the virtual object's characteristics. This dynamic reconfiguration capability significantly improves the ability to simulate diverse objects while managing structural complexity through controlled adjustability.

Inventive Principle:
Principle #15Dynamics

3Reliability

If the hinge mechanism allows continuous pivoting, then the ease of operation is improved, but the ability to provide stable gripping sensation is reduced

Engineering Contradiction:
Improvestability of gripping sensationVSAvoidpivoting freedom
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The patent applies preliminary anti-action by implementing braking mechanisms that counteract continuous pivoting motion at appropriate moments. The hinge mechanisms include brakes that can be activated to prevent further pivoting once the desired gripping position is reached, providing stability to the gripping sensation. This preliminary counter-action ensures that the virtual hand maintains a stable grasp on the object while still allowing free pivoting during the approach and adjustment phases, thus balancing reliability and ease of operation.

Inventive Principle:
Principle #9Preliminary anti-action

Solution Approach 2:

The system employs feedback by detecting the pivoting state of the hinge mechanisms and providing haptic or visual feedback to the user. When the virtual hand achieves proper gripping alignment, the system provides feedback signals that indicate stable contact, allowing the user to know when to engage the brake for stability. This feedback loop enables the user to maintain ease of operation during exploration while achieving reliable stable gripping sensation when needed.

Inventive Principle:
Principle #23Feedback

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

Enhances the user's sense of gripping and holding virtual objects, providing a more realistic experience by allowing the joints of the hand to grip objects tightly, addressing the limitations of prior art in simulating sensory feedback.

Implementation Method 1

the clutch is an overrunning clutch, and an inner ring of the overrunning clutch comprises a groove and a spring arranged in the groove; the blocking member extends into the groove; the spring presses against the blocking member to provide a force to limit the relative rotations of the clutch outer ring and the clutch inner ring; when a speed of the clutch inner ring is greater than a speed of the clutch outer ring or the speed of the clutch outer ring is greater than the speed of the clutch inner ring, the overrunning clutch stops a pivoting in the first direction and allows a pivoting in a second direction opposite to the first direction

Methodology Applied
Scientific EffectOverrunning clutch mechanism: Ratchet

Data Source

PatentEP3690608B9Smart wearable apparatus, smart wearable device, and control method
Publication Date: 2022.08.03 CHEN ZHAOSHENG
  • EP3690608B9 patent drawingFigure 1~2
  • EP3690608B9 patent drawingFigure 3
  • EP3690608B9 patent drawingFigure 4

AI summary

A smart wearable apparatus, smart wearable equipment, and a control method of the smart wearable equipment are provided. The smart wearable apparatus includes a rigid body, at least one hinge mechanism, a brake and a controller. The hinge mechanism is arranged on the rigid body, and the hinge mechanism includes a first pivot portion, a second pivot portion, and a pivot arranged between the first pivot portion and the second pivot portion. By means of the hinge mechanism, two portions of the rigid body, which are connected, respectively, to the first pivot portion and the second pivot portion of the hinge mechanism, can pivot relative to each other in a first direction. The brake is connected to the hinge mechanism, and the brake can receive a first control signal from the controller to stop the hinge mechanism, thereby stopping the two portions of the rigid body from relatively pivoting. The smart wearable apparatus, the smart wearable equipment and the control method of the smart wearable equipment provided by the present invention make the user feel his/her knuckles grip objects tightly to a maximum extent to provide the sense of gripping and holding, thereby making the user feel as if he/she was gripping and holding objects in the virtual scene.