Retractable Headband Earphone Positioning Mechanism
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Solution Overview
Problem
Existing head-mounted devices with retractable earphone bands struggle to accurately position earphones relative to the user's ears, leading to suboptimal sound quality and discomfort due to inadequate adjustment.
Innovation Solution
A head-mounted device featuring a retractable headband with an earphone connection part and a mechanism where the change in distance between the earphone connection part and the first connection end is less than half of the elongation amount, allowing for better fitting and sound quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the headband length is adjusted to fit different head sizes, then the wearing comfort is improved, but the earphone position cannot correspond to the user's ears
Solution Approach 1:
The headband is divided into two functional segments: a retractable portion for length adjustment and a fixed portion connecting to the earphones. This segmentation allows the headband length to be adjusted for different head sizes while keeping the earphone position relative to the host stable, resolving the contradiction between wearing comfort and position accuracy.
Solution Approach 2:
The headband incorporates a retractable mechanism that allows dynamic length adjustment to accommodate different head circumferences. This dynamic adjustment improves wearing comfort while the earphone connection remains fixed relative to the host, maintaining position accuracy.
2Adaptability or versatility
If the earphone moves with the headband extension, then the headband can fit different head sizes, but the earphone position changes excessively
Solution Approach 1:
The headband system is segmented into a retractable portion and a fixed connection portion. The retractable portion absorbs the extension movement, while the fixed portion maintains consistent earphone positioning relative to the host, enabling both size adaptation and position consistency.
Solution Approach 2:
The retractable mechanism acts as an intermediary between the host and the earphones, absorbing the movement caused by headband extension. This intermediary allows the headband to adapt to different head sizes while preventing excessive earphone position changes.
3Adaptability or versatility
If the headband is made retractable to accommodate different users, then the adaptability is improved, but the earphone connection stability deteriorates
Solution Approach 1:
The headband is segmented into a retractable section for adaptability and a fixed connection section for stability. This segmentation allows the system to accommodate different users through length adjustment while maintaining stable earphone connection relative to the host.
Solution Approach 2:
The retractable mechanism provides dynamic adaptability for different users, while the fixed connection portion maintains static stability for the earphone connection. This combination of dynamic and static elements resolves the contradiction between adaptability and connection stability.
Data Source
AI summary
A head-mounted device and a retractable headband are provided. The head-mounted device includes a host, a retractable headband, and an earphone. The host has a first connection part and a second connection part located on two opposite sides. The retractable headband has an earphone connection part and a first connection end and a second connection end located on two opposite sides. The first connection end is connected to the first connection part. The second connection end is connected to the second connection part. When the retractable headband is elongated by an elongation amount, a change in a distance between the earphone connection part and the first connection end is less than half of the elongation amount. The earphone is connected to the earphone connection part.