Detachable Headphone Accessory Joint to Prevent Contact Pad Wear
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Solution Overview
Problem
Headphones with external accessories experience wear of conductive contact pads due to rubbing when the angle is adjusted, reducing their service life.
Innovation Solution
A headphone design that allows the external accessory to be detachably assembled with a body connection portion, where rotation of the external accessory synchronously rotates the body connection portion, preventing direct contact between conductive contact pads and reducing wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the external accessory is rotated to adjust the angle, then the angle adjustment function is achieved, but the conductive contact pads wear due to rubbing
Solution Approach 1:
The patent divides the contact system into two separate rotational components: the external accessory rotates on its own axis, while the body connection portion rotates independently on the headphone body. This segmentation prevents the conductive contact pads from rubbing against each other during angle adjustment, as each rotational movement occurs around a different axis and the contact pads remain relatively stationary with respect to each other.
Solution Approach 2:
The patent introduces a magnetic coupling mechanism as an intermediary between the external accessory and the body connection portion. The magnetic force provides the necessary holding force to maintain electrical contact without requiring direct mechanical contact between the conductive contact pads, thereby eliminating wear while maintaining connection stability.
2Reliability
If the conductive contact pads are in direct contact to ensure electrical connection, then electrical connectivity is achieved, but wear occurs during rotation
Solution Approach 1:
The patent introduces a magnetic coupling mechanism as an intermediary between the external accessory and the body connection portion. The magnetic force provides the necessary holding force to maintain electrical contact without requiring direct mechanical contact between the conductive contact pads, thereby eliminating wear while maintaining connection stability.
Solution Approach 2:
The patent replaces the traditional mechanical contact-based connection system with a magnetic field-based coupling system. Instead of relying on direct mechanical contact between conductive contact pads that cause wear during rotation, the invention uses magnetic attraction to maintain the electrical connection, substituting a mechanical wear-prone system with a non-contact magnetic field system.
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
Extends the service life of conductive contact pads by preventing direct rubbing, ensuring longer durability and reduced wear.
Implementation Method 1
the first joint member and the second joint member are a first annular magnetic member and a second annular magnetic member, respectively
Data Source
AI summary
A headphone includes a body connection portion and an external accessory. The body connection portion includes a first circuit board, at least one first connection terminal and a first joint member. The external accessory is able to be detachably assembled to the body connection portion and includes a second circuit board, at least one second connection terminal configured to electrically connect to the at least one first connection terminal and a second joint member configured to join to the first joint member. After the first and second joint members are joined to each other and the first and second connection terminals are electrically connected to each other, when the external accessory is rotated, the first joint member is rotated, and the first circuit board and the at least one first connection terminal are also rotated.