Bluetooth Headset Wire Rewinding Module Axis Wear Prevention
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Solution Overview
Problem
Conventional automatic rewinding devices for electronic equipment suffer from wear and tear over long-duration usage, leading to twisted rotation axes, which can cause breakaway between terminals and PCB patterns, resulting in short circuits and malfunctioning wire winding.
Innovation Solution
An automatic winding module for Bluetooth headsets featuring a base housing with a cylindrical fixed axis, a winding housing with a wear-resistant insert, and a cap that maintains the rotation axis without twist, utilizing a rolling elastic member and braking teeth to prevent axis deviation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional automatic rewinding devices are used for long-duration usage, then the wire winding function is initially effective, but the rotation axis becomes twisted and worn down, leading to short circuits and malfunction
Solution Approach 1:
The patent introduces a ball as an intermediary element that rolls along a track formed by the rotation axis and cap. This ball intermediary transfers the rotational motion while protecting the rotation axis from direct wear and twist, thereby maintaining the wire winding function over extended usage periods without the axis degradation that occurs in conventional designs
Solution Approach 2:
The patent employs a composite structure combining the rotation axis, cap, and ball into an integrated rotational mechanism. The track is formed by the interaction between the rotation axis and cap surfaces, creating a composite wear-resistant system where the ball rolls along this track, distributing wear and preventing the rotation axis from becoming twisted or worn down as in conventional single-material designs
2Ease of operation
If the rotation axis is allowed to rotate freely for wire winding, then the wire can be automatically rewound, but the rotation axis twists and disintegrates over time, causing terminal breakaway from PCB patterns
Solution Approach 1:
The ball serves as a mediator that enables the automatic wire rewinding function while protecting the rotation axis integrity. As the ball rolls along the track formed by the rotation axis and cap, it transmits the rotational motion needed for wire winding without allowing the rotation axis to twist or disintegrate, thus maintaining both operational ease and structural stability
Solution Approach 2:
The patent transforms the static rotation axis into a dynamic system where the ball rolls along a track formed by the interaction between the rotation axis and cap. This dynamic mechanism allows the rotation axis to maintain its integrity while still enabling the automatic wire rewinding function through the rolling motion of the ball
3Reliability
If multiple terminals are increased for better PCB pattern contact, then the connection reliability improves, but the requirement for precise rotation increases, making the system more sensitive to rotation axis twist and wear
Solution Approach 1:
The ball intermediary maintains precise rotation by rolling along the track formed by the rotation axis and cap. This mechanism ensures that even with multiple terminals requiring precise PCB pattern contact, the rotation remains accurate and consistent, preventing the twist and wear that would otherwise compromise rotation precision and terminal connectivity
Data Source
AI summary
An automatic winding module of a wire for Bluetooth headset with an improved wear resistance function of a rotation axis, which firmly maintains a rotation axis without twist of the rotation axis even in case of using it for a long time, thereby preventing breakaway between a terminal and a PCB pattern, to prevent a short circuit from occurring.