Head Strap Module With Elastic Ratchet Quick Adjustment
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Solution Overview
Problem
Existing head mounted devices require time-consuming adjustments of the head strap module through knobs for fitting and removal, which is inefficient and cumbersome for users with different head sizes.
Innovation Solution
A head strap module with elastic members that can be directly stretched for wearing, automatically adapting to different head sizes, and a simple intuitive method involving a driving member for length adjustment, allowing quick fitting and removal without knobs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a knob mechanism is used to adjust the head strap module length, then the head strap module can be adjusted to fit different head sizes, but the adjustment process becomes time-consuming and cumbersome
Solution Approach 1:
The patent replaces the static knob adjustment mechanism with a dynamic elastic member system that automatically adapts to different head sizes. The elastic members (springs) provide continuous adjustment capability without requiring manual rotation, allowing the head strap module to dynamically conform to various head circumferences while eliminating time-consuming adjustment steps.
Solution Approach 2:
The elastic members are configured to automatically adjust the head strap module length based on the user's head size without requiring manual operation. When the user places the head mounted device on their head, the elastic members self-adjust to provide the appropriate tightness and fit, eliminating the need for the user to manually rotate knobs for adjustment.
2Ease of operation
If a knob mechanism is used to adjust the head strap module, then the length can be modified, but the operation becomes complex and requires multiple rotational steps
Solution Approach 1:
The patent extracts the complex knob rotation mechanism and replaces it with a simpler elastic member-based system. The elastic members directly provide the adjustment function without requiring intermediate rotational components, thereby simplifying the operation while reducing mechanical complexity.
Solution Approach 2:
The patent replaces the mechanical knob rotation system with an elastic deformation system. Instead of using mechanical gears and rotational movement to adjust length, the elastic members use elastic deformation to provide continuous adjustment, eliminating the need for complex mechanical transmission components.
3Device complexity
If the head strap module uses a fixed length design, then the structure is simple, but it cannot accommodate different head circumferences
Solution Approach 1:
The patent introduces dynamic elastic members that allow the head strap module to change length according to different head circumferences. The elastic members provide a simple yet effective mechanism for adaptation without requiring complex adjustable structures, maintaining structural simplicity while achieving versatility.
Solution Approach 2:
The patent changes the physical state of the head strap module from fixed to variable by incorporating elastic members. The elastic members allow the strap length and tension to vary continuously based on the user's head size, providing adaptability while maintaining a simple overall structure.
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
Provides a streamlined and efficient way to adjust the head strap module for a secure fit, reducing the time and effort required for fitting and removal, and enhancing user convenience.
Implementation Method 1
The first elastic member is disposed between the bracket and the first strap. The second elastic member is disposed between the bracket and the second strap. The first elastic member and the second elastic member respectively drive the first strap and the second strap to move relative to the bracket
Implementation Method 2
The braking member is movably disposed on the bracket along the rotation axis and has a second ratchet portion. An engagement between the second ratchet portion and the first ratchet portion allows the rotating member to rotate relative to the bracket along a first clockwise direction of the rotation axis and restricts the rotating member from rotating relative to the bracket in a second clockwise direction opposite to the first clockwise direction
Data Source
AI summary
A head mounted device includes a host and a head strap module. The head strap module includes a bracket and following components. A pair of straps are respectively connected to the host, at least partially overlapped, and movably disposed in the bracket. A pair of elastic members respectively drive the pair of straps to move relative to the bracket to increase an overlapping degree of the pair of straps. A rotating member is rotatably disposed on the bracket on a rotation axis and coupled to the pair of straps to move synchronously relative to the bracket. A braking member is movably disposed on the bracket along the rotation axis and has a second ratchet portion to engage with a first ratchet portion of the rotating member. A reset member is disposed between the bracket and the braking member and maintains the engagement between the second ratchet portion and the first ratchet portion. A driving member is movably disposed on the bracket to release the engagement between the first ratchet portion and the second ratchet portion by force.