Rotating Mechanism Elastic Clamping Feedback

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Solution Overview

Problem

Existing rotating mechanisms in head-mounted display apparatuses face difficulty in providing feedback of the rotation angle to the operator, necessitating the inclusion of an expansion mechanism, which complicates design and assembly.

Innovation Solution

A rotating mechanism with a stationary component and a rotating component connected via clamping grooves and elastic clamping blocks, where the elastic blocks deform to slide out of grooves, generating feedback signals to indicate rotation angle, eliminating the need for an expansion mechanism.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If an expansion mechanism is included to provide rotation angle feedback, then the rotation angle feedback is achieved, but the design and assembly complexity increases

Engineering Contradiction:

Improverotation angle feedbackVSAvoiddesign and assembly complexity

Core Design Contradiction:

Loss of informationVSDevice complexity

Solution Approach 1:

The patent replaces complex mechanical feedback mechanisms with a simplified elastic clamping block system. The elastic clamping blocks naturally deform to engage or disengage from clamping grooves based on rotation angle, eliminating the need for expansion mechanisms while providing clear tactile feedback.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The elastic clamping blocks automatically engage with clamping grooves at specific rotation angles without requiring additional actuators or sensors. The elastic deformation of the clamping blocks themselves provides the feedback mechanism, making the system self-servicing and eliminating complex external feedback systems.

Inventive Principle:

Principle #25Self-service

2Loss of information

If an expansion mechanism is included to provide rotation angle feedback, then the rotation angle feedback is achieved, but the assembly process becomes more complex

Engineering Contradiction:

Improverotation angle feedbackVSAvoidassembly process

Core Design Contradiction:

Loss of informationVSEase of manufacture

Solution Approach 1:

The feedback mechanism is segmented into multiple independent elastic clamping blocks that can be individually positioned and assembled. Each clamping block corresponds to specific clamping grooves, allowing for modular assembly and simplifying the manufacturing process compared to integrated expansion mechanisms.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Measurement precision

If multiple clamping grooves are consecutively arranged, then the rotation angle can be quantified, but the structure becomes more complex

Engineering Contradiction:

Improverotation angle measurementVSAvoidstructural complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The elastic clamping blocks serve multiple functions: they provide structural support, enable rotation, and simultaneously serve as the feedback mechanism through their elastic deformation. The clamping grooves on the rotating component work universally with the elastic clamping blocks to provide both mechanical connection and angle measurement.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent merges the structural support function and the feedback function into a single integrated system. The elastic clamping blocks and clamping grooves together provide both the mechanical connection for rotation and the tactile feedback for angle measurement, eliminating the need for separate feedback mechanisms.

Inventive Principle:

Principle #5Merging (Combining)

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 accurate feedback of rotation angle without requiring an expansion mechanism, simplifying design, assembly, and reducing costs by using feedback signals to quantify the rotation angle, improving the accuracy of angle adjustments.

Implementation Method 1

Each elastic clamping block is configured to be capable of being elastically deformed in a direction away from the clamping groove under a squeezing action of an inner surface of the clamping groove

Methodology Applied

Scientific EffectElastic deformation: Elasticity

Data Source

PatentUS10823972B2Rotating mechanism and head-mounted display apparatus

Publication Date: 2020.11.03 BEIJING BOE OPTOELECTRONCIS TECH CO LTD

AI summary

A rotating mechanism includes a stationary component and a rotating component rotatablely connected to the stationary component. One of the stationary component and the rotating component is provided with at least one group of clamping grooves each including a plurality of clamping grooves that are consecutively arranged in a rotation direction of the rotating component. The rotating mechanism further includes at least one elastic clamping block, which is in one-to-one correspondence with the at least one group of clamping grooves, disposed on another one of the stationary component and the rotating component. Each elastic clamping block is configured to be capable of being matched with any clamping groove of a plurality of clamping grooves included in a corresponding group of clamping grooves, and to be capable of being elastically deformed in a direction away from the clamping groove under a squeezing action of an inner surface of the clamping groove.