Miniature Speaker Recess for Lead Wire Protection
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Solution Overview
Problem
Miniature speakers in mobile devices face issues with lead wire breakage due to their small size and vulnerability during assembly and vibration, leading to potential failure and noise generation.
Innovation Solution
The design incorporates a recess formed by steps and bevels in the frame and yoke, providing an enlarged space for lead wires, which prevents breakage and ensures secure placement, enhancing the structural integrity and reducing noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the miniature speaker is designed with small size to meet mobile device requirements, then the profile and dimensions are improved, but the lead wires become vulnerable to breakage during assembly and vibration
Solution Approach 1:
The patent applies preliminary action by forming a recess in the magnetic circuit unit before assembling the lead wires. This recess is pre-formed to specifically accommodate and protect the lead wires, preventing their breakage during subsequent assembly and vibration. The protective structure is established in advance rather than as a reactive measure.
Solution Approach 2:
The recess in the magnetic circuit unit serves as an intermediary protective structure between the lead wires and the external environment. It provides a dedicated space that shields the lead wires from mechanical stress and vibration, acting as a mediator that protects the vulnerable component while maintaining the compact speaker design.
2Adaptability or versatility
If the lead wires are extended to connect voice coil to external circuits, then the electrical connection functionality is improved, but the risk of lead wire breakage increases due to limited space
Solution Approach 1:
The patent applies local quality by creating a specific region (recess) in the magnetic circuit unit with different structural characteristics. This recess provides enhanced protection and accommodation space specifically for the lead wires, while the rest of the speaker maintains its compact design. The protective feature is localized exactly where needed rather than requiring overall size increase.
3Volume of moving object
If the speaker components are tightly arranged to reduce size, then the compactness is improved, but the lead wires have insufficient space which causes breakage and noise
Solution Approach 1:
The patent applies the nesting principle by placing the lead wires inside a recess that is formed within the magnetic circuit unit itself. The recess is essentially a cavity or hollow space created within the existing structure, allowing the lead wires to be nested within the magnetic circuit unit rather than occupying additional external space. This maintains compactness while providing protection.
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
The solution effectively prevents lead wire breakage and noise issues by providing a sufficient and secure space for the lead wires, ensuring reliable operation and improved acoustic performance in miniature speakers.
Implementation Method 1
The voice coil is configured to receive corresponding electrical signals from the external circuit via the elastic contacts by electrically connecting leads wires thereof to the contacts
Implementation Method 2
The sound generator includes a magnetic circuit unit, a diaphragm, and a voice coil driving the diaphragm to vibrate
Data Source
AI summary
A miniature speaker includes a frame having a sidewall including a first upper thinner portion and a first lower thicker portion, a magnetic circuit unit, a voice coil having a lead wire, and a diaphragm driven by the voice coil. The magnetic circuit unit has a yoke, a magnet mounted on the yoke, a pole plate attached to the magnet, and a magnetic gap. The yoke further includes a lower plate and a side extending from the lower plate, the side including a second thinner portion and a second lower thicker portion. A recess is accordingly formed by the thinner portions and the thicker portions for accommodating the lead wire of the voice coil. The recess defines a bottom formed by the thicker portions and an opening formed by the thinner portions thereby providing an enlarged space to the lead wire.