Motor-Driven Headband Girth Adjustment for HMD
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Solution Overview
Problem
Current head-mounted display devices require significant user effort to adjust the headband to fit different head sizes, affecting convenience and user experience.
Innovation Solution
A head-mounted display device with a wearable assembly, an adjusting module, and a control module that includes a transmission mechanism and driving element, allowing automatic adjustment of the headband's girth through motor-driven actuation in response to user input or signals, enabling fitting to various head sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manual adjustment mechanisms (Velcro tape or gear plus knob) are used for the headband, then the headband can be adjusted to fit different head sizes, but the user has to spend more time and effort to adjust the headband
Solution Approach 1:
The patent replaces the traditional mechanical adjustment mechanisms (Velcro tape or gear plus knob) with an electromechanical system consisting of a motor, transmission mechanism, and driving element. This substitution automates the headband adjustment process, allowing the headband to be lengthened or shortened automatically in response to user input signals, thereby eliminating the manual time and effort previously required while maintaining adaptability to different head sizes
Solution Approach 2:
The system enables the headband to adjust itself automatically based on user input signals. The motor-driven transmission mechanism performs the adjustment action without requiring manual manipulation of adjustment components, making the system serve itself in the adjustment process and greatly reducing user effort and time expenditure
2Ease of operation
If a motor-driven transmission mechanism is used to automatically adjust the headband, then adjustment convenience is improved, but the device complexity increases
Solution Approach 1:
The patent divides the adjustment system into distinct functional modules: a motor unit, a transmission mechanism with driving elements, and the headband assembly. This segmentation allows each component to be optimized independently and facilitates easier maintenance and troubleshooting, partially offsetting the complexity increase by improving modularity
Solution Approach 2:
The motor-driven transmission mechanism serves multiple functions: it can lengthen the headband, shorten the headband, and potentially maintain position. This multi-functionality consolidates what would otherwise require multiple separate mechanisms into a single integrated system, helping to manage overall device complexity while providing comprehensive adjustment capabilities
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 user convenience by allowing quick and effortless adjustment of the headband's girth, improving the overall experience of wearing and using the device.
Implementation Method 1
a driving element 120B and a transmission mechanism 120A, wherein the adjusting module 120 is movably coupled to the wearable assembly 110 through the transmission mechanism 120A, and the driving element 120B is further coupled to the transmission mechanism 120A
Data Source
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AI summary
A head-mounted display device includes a wearable assembly, an adjusting module and a control module. The wearable assembly is suitable for wearing to a user's head. The adjusting module is movably coupled to the wearable assembly, and includes a transmission mechanism and a driving element. The transmission mechanism is movably coupled to the wearable assembly, and the driving element is coupled to the transmission mechanism. The control module is electrically connected to the driving element. When the control module outputs a control signal to the driving element, the driving element drives the transmission mechanism to actuate, such that the transmission mechanism drives the wearable assembly along with driving of the driving element to change a girth of the wearable assembly to fit heads of different users.