Head-Mounted Device Headbands With Magnetic One-Handed Adjustment
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Solution Overview
Problem
Existing headband systems for head-mounted devices suffer from durability issues with fasteners like hook and loop fasteners degrading over time, and lack efficient mechanisms for one-handed adjustment and removal.
Innovation Solution
The use of alternative fasteners such as magnets, hooks, buckles, extruded snaps, or cables, along with release mechanisms, allows for secure attachment and one-handed adjustment of headband systems, enhancing durability and ease of use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hook and loop fasteners are used to attach headband portions, then the headband system can be adjusted and secured, but the fasteners degrade over time causing durability issues
Solution Approach 1:
The patent replaces mechanical hook and loop fasteners with a magnetic fastening system. Magnets embedded in the headband portions create magnetic attraction forces that secure the headband without degrading over time. This substitution eliminates the durability issues associated with mechanical fastener degradation while maintaining adjustable and secure attachment capabilities.
2Ease of operation
If traditional fastening mechanisms are used, then the headband can be secured, but one-handed adjustment and removal become difficult
Solution Approach 1:
The magnetic fastening system allows the headband to be easily adjusted and removed by simply pulling the headband portions apart, which naturally overcomes the magnetic attraction. This self-service mechanism eliminates the need for complex buckles or clips, enabling one-handed operation while maintaining secure attachment during normal use.
3Ease of operation
If the release mechanism is added to allow easy removal, then one-handed operation is enabled, but the mechanism may inadvertently release during normal use
Solution Approach 1:
The magnetic fastening system creates a preliminary securing action where the magnetic attraction force continuously holds the headband portions together during normal use. This preliminary magnetic bonding prevents inadvertent release while still allowing intentional removal by applying sufficient pulling force to overcome the magnetic attraction.
Solution Approach 2:
The patent utilizes magnetic field strength as a controllable parameter. By adjusting the magnetic attraction force to be sufficiently strong for normal use but overcomeable with deliberate action, the system achieves both stability during wear and ease of removal. The magnetic force parameter is optimized to prevent accidental release while enabling one-handed operation.
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
The solution provides a durable and adjustable headband system that maintains secure fitting and allows for easy one-handed adjustment and removal, improving user comfort and convenience.
Implementation Method 1
one or more magnets, extruded snaps, buckles, rack and pinion systems, and/or cables may be used to adjust the tension of the headband portions and/or to lock the headband portions in place
Data Source
AI summary
A head-mounted device may include optical assemblies for presenting images to a user. The optical assemblies may be mounted in a head-mounted device housing. The head-mounted device housing may be supported at the front of the head of a user in front of the user's eyes using a headband system that includes one or more headband portions. The headband portions may be tightened or loosened to adjust the fitment of the headband system on the user's head. To allow for headband adjustments while locking the position of the headband portions after the adjustments, one or more magnets, extruded snaps, buckles, release mechanisms, rack and pinion systems, and/or cables may be used to adjust the tension of the headband portions and/or to lock the headband portions in place.