HMD Strap Rack-and-Pinion Adjustment Mechanism
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Solution Overview
Problem
Traditional virtual reality headsets often suffer from poor fit issues due to their heavy design, leading to discomfort and difficulty in achieving an immersive experience, especially when used by multiple users, as they require frequent refitting and have sub-optimal strap configurations that can be awkward to put on or remove.
Innovation Solution
The implementation of a head-mounted-display strap apparatus featuring a rack-and-pinion assembly with a constant-force spring, allowing for adjustable and secure fitting by rotating a pinion that repositions a rack relative to the head-mounted display, thereby adjusting the strap's position and tension to accommodate different head sizes and provide a comfortable fit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional headset straps are used with manual adjustment mechanisms, then the structure is simple, but the fitting process is time-consuming and difficult to achieve proper fit
Solution Approach 1:
The patent replaces traditional manual strap adjustment mechanisms with an electric motor-driven rack and pinion system. The motor automatically positions the rack to adjust strap tension and headset fit, eliminating the need for users to manually manipulate complex adjustment mechanisms. This substitution of mechanical systems with automated electromechanical systems directly addresses the contradiction by making fitting easier and faster.
Solution Approach 2:
The patent implements a self-adjusting mechanism where the motor automatically positions the rack based on pre-programmed parameters or user input, eliminating the need for manual intervention in the adjustment process. The system performs the fitting adjustment itself, reducing both the time required and the complexity of user interaction.
2Reliability
If headset is designed to be heavy for immersive experience, then the display quality is improved, but the comfort and fit become problematic
Solution Approach 1:
The patent employs a dynamic adjustment mechanism with a motor-driven rack and pinion system that allows real-time modification of headset position and strap tension. This dynamic system enables the headset to adapt to different users and usage conditions, distributing the weight of the heavy display more comfortably across various head sizes and shapes, thereby maintaining immersive experience while improving comfort.
Solution Approach 2:
The patent changes physical parameters such as strap tension, headset position, and contact point pressure through motor-driven rack adjustment. By dynamically modifying these parameters, the system accommodates the weight of heavy displays on different users, maintaining both the immersive quality and comfort during extended use.
3Adaptability or versatility
If traditional manual adjustment mechanisms are used, then the device complexity is low, but the adjustability and precision of fit are insufficient
Solution Approach 1:
The patent replaces simple manual adjustment mechanisms with an electromechanical motor-driven rack and pinion system. This substitution increases adjustability and precision through motor control while managing complexity through integrated design. The motorized system provides fine-grained adjustment capability and programmable positioning that manual mechanisms cannot achieve.
Solution Approach 2:
The motor-driven rack and pinion mechanism serves multiple functions: it adjusts strap tension, positions the headset on the head, and accommodates various head sizes and shapes. This multi-functional design increases adaptability while consolidating multiple adjustment operations into a single integrated mechanism, managing the complexity through functional consolidation.
4Adaptability or versatility
If frequent refitting is required for multiple users, then the headset can be shared, but the time and effort for refitting increases
Solution Approach 1:
The motor-driven adjustment system enables rapid automated refitting between users by programmatically adjusting the rack position and strap tension based on user-specific parameters. The system performs the refitting adjustment itself without requiring manual manipulation, significantly reducing the time and effort required for multi-user transitions.
Solution Approach 2:
The patent replaces manual refitting operations with an automated electromechanical adjustment system. The motor-driven rack and pinion mechanism可以快速ly repositions the headset and adjusts strap tension for different users, eliminating the time-consuming manual adjustment process and enabling efficient multi-user sharing.
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
This solution enhances the adjustability and comfort of virtual reality headsets, allowing for a secure and immersive experience by accommodating various head sizes and reducing the time and effort required for fitting, while maintaining tension to hold the headset in place.
Implementation Method 1
a constant-force spring that includes a ribbon with a rolled portion and a protracted section that extends from the rolled portion
Implementation Method 2
a rack that is coupled to a proximal section of the strap and includes a plurality of teeth in mesh with the pinion such that (1) rotation of the pinion repositions the rack relative to the head-mounted display
Data Source
AI summary
A head-mounted-display adjustment apparatus may include a strap with a distal section coupled to a distal area of a head-mounted display. The adjustment apparatus may also include a pinion rotatably coupled to a proximal area of the head-mounted display in a manner that holds the head-mounted display against a user's face when a user is wearing the head-mounted display. In addition, the adjustment apparatus may include a rack that is coupled to a proximal section of the strap and includes a plurality of teeth in mesh with the pinion such that (1) rotation of the pinion repositions the rack relative to the head-mounted display and (2) repositioning the rack adjusts an area between the strap and the head-mounted display. Various other head-mounted-display adjustment apparatuses, systems, and methods are also disclosed.