Adjustable Headband Stiffness via Sliding Secondary Section
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Solution Overview
Problem
Conventional headbands for headphones often provide uncomfortable clamping force due to fixed sizes and stiffness, making it difficult for users to adjust the fit according to their preferences, and existing adjustable solutions are cumbersome or prone to involuntary displacement.
Innovation Solution
A headband design featuring a primary and secondary arc-shaped section with fixed holding means that allow for adjustable stiffness by varying the area between the sections, enabling easy and accurate customization of the fit without external assistance, even when worn.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the headband is manufactured in one or a few fixed sizes with fixed stiffness, then production cost is reduced and manufacturing is simplified, but the user cannot adjust the clamping force to match personal preference or head size variations
Solution Approach 1:
The headband is divided into a primary headband portion and a secondary headband section that can be independently positioned. The secondary section can be moved to different locations along the primary portion, creating segmented zones that allow adjustment of the effective headband length and stiffness without requiring multiple complete headband sizes.
Solution Approach 2:
The headband transitions from a static, fixed-length structure to a dynamic system where the secondary headband section can be repositioned along the primary portion. This dynamic adjustment capability allows the user to modify the headband's effective length and stiffness according to their needs, while the holding means ensure stable positioning once adjusted.
2Adaptability or versatility
If movable clamps are used to adjust headband stiffness by changing spacing between steel strips, then the user can control the clamping force, but the clamps are awkward to move when the headband is worn and may be involuntarily displaced by contact with the user's head
Solution Approach 1:
The adjustment mechanism is extracted from the traditional movable clamp design and replaced with a secondary headband section that slides along the primary portion. This separation allows the adjustment function to be independent of the clamping function, enabling easier operation without direct contact between the adjustment mechanism and the user's head.
Solution Approach 2:
The secondary headband section acts as an intermediary element between the primary headband portion and the adjustment mechanism. By sliding this intermediate section along the primary portion, the user can adjust stiffness without directly manipulating clamps that would otherwise contact and potentially be displaced by the head.
3Adaptability or versatility
If the secondary headband section is made movable relative to the primary headband portion, then the stiffness can be adjusted, but the structure becomes more complex and may be prone to accidental displacement
Solution Approach 1:
The adjustment mechanism is merged with the headband structure itself rather than being a separate component. The secondary headband section is integrated with the primary portion through holding means that combine positioning and locking functions, reducing overall structural complexity while maintaining adjustability.
Solution Approach 2:
The holding means are designed to automatically secure the secondary headband section at selected positions along the primary portion. Once the user positions the secondary section, the holding means self-engage to lock it in place, preventing accidental displacement without requiring additional active locking mechanisms or complex fastening systems.
4Force
If the area between the primary and secondary headband sections is increased to increase stiffness, then the clamping force can be enhanced, but the headband may become too rigid for comfortable wear
Solution Approach 1:
The headband stiffness is made dynamic rather than fixed. By allowing the secondary headband section to be repositioned, the user can adjust the area between sections to achieve the desired balance between clamping force and comfort. The same headband structure can provide different stiffness levels depending on the position of the secondary section.
Solution Approach 2:
The physical parameter of the headband (stiffness/clamping force) is changed by modifying the geometric parameter (area between primary and secondary sections). This allows continuous adjustment of the mechanical properties without changing the material or overall structure, enabling optimization of both clamping force and comfort for different users and situations.
Data Source
AI summary
A headband (100) for a pair of headphones (10.1, 10.2) comprising:—a primary headband portion (110) having a first end (111) and a second end (112) configured to be connected to a respective headphone (10.1, 10.2) and an arc-shaped primary headband section (200) extending between the first and the second end (111, 112) of the primary headband portion (110);—an arc-shaped secondary headband section (300) extending along the arc-shaped primary headband section (200) and;—at least a first holding means (120, 121) for holding the arc-shaped secondary headband section (300) to the primary headband portion (110), wherein;—the at least first holding means (120, 121) is fixed to the primary headband portion (110);—the at least first holding means (120, 121) is configured such that the arc-shaped secondary headband section (300) can be moved towards or away from the primary headband section (200) whereby the area (A) delimited between the primary headband portion (110) and the secondary headband section (300) is varied.