Audio Speaker Magnet Assembly Electrical Path
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Solution Overview
Problem
In portable consumer electronics, the external leads required for microspeakers occupy valuable space, limiting the size of the magnet assembly and the overall speaker size, which affects sound output and miniaturization.
Innovation Solution
The audio speaker design reduces the number of external leads by utilizing the electrical properties of the magnet assembly, where a wire coil with two terminals is suspended in an air gap and electrically connected to a conductive top plate, which forms part of the electrical circuit, eliminating the need for additional external leads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If external leads are routed into and through the microspeaker to complete the electrical circuit, then the electrical connectivity is established, but the valuable space is occupied and the magnet size is limited
Solution Approach 1:
The patent merges the electrical circuit path with the magnet assembly structure. The magnet assembly is designed to serve dual purposes: providing the magnetic field for voicecoil operation and simultaneously serving as the electrical circuit path. This eliminates the need for separate external leads routing through the speaker, freeing up valuable internal space.
Solution Approach 2:
The magnet assembly is given multiple functions: it generates the magnetic field necessary for voicecoil operation and simultaneously acts as the electrical circuit carrier. This multi-functionality approach allows the same structural component to fulfill both magnetic and electrical roles, reducing the overall component count and space requirements.
2Volume of moving object
If the number of external leads is reduced, then space is freed up to increase magnet size for better sound output, but the electrical circuit completion becomes more challenging
Solution Approach 1:
The electrical circuit path is merged with the magnet assembly structure itself. The magnet assembly serves as both the magnetic field source and the electrical circuit carrier, eliminating the need for separate lead routing and simplifying the overall device architecture.
Solution Approach 2:
The magnet assembly serves itself by providing both magnetic and electrical functions. The structure that generates the magnetic field simultaneously provides the electrical circuit path, making the system self-sufficient and eliminating external dependencies for circuit completion.
3Reliability
If external leads are routed around the magnets to connect to contact pads, then the electrical circuit is completed, but the routing volume increases and space is consumed
Solution Approach 1:
The electrical circuit path is merged with the magnet assembly structure. Instead of routing leads around the magnets through the speaker housing, the circuit path is integrated into the magnet assembly itself, eliminating the need for external routing and reducing routing volume to minimal.
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
This design frees up space to increase the magnet size for better sound output or further miniaturize the speaker, while maintaining effective electrical connectivity without compromising the magnetic field.
Implementation Method 1
The magnetic steel directs a magnetic field generated by the magnets toward a voicecoil. Thus, when an electrical audio signal current is delivered through the voicecoil, the voicecoil moves to generate sound.
Implementation Method 2
when an electrical audio signal current is delivered through the voicecoil, the voicecoil moves to generate sound
Implementation Method 3
a first terminal of the wire coil is in electrical contact with the top plate of the magnet assembly... The top plate may electrically connect first conductive pad to the first terminal
Data Source
AI summary
An audio speaker having a magnet assembly for directing a magnetic field through a magnetic circuit, and an electrical circuit for carrying an electrical audio signal current through at least part of the magnet assembly, are disclosed. More particularly, a voicecoil in the electrical circuit may be in electrical contact with a magnetic plate of the magnet assembly. The voicecoil may be electrically connected with a speaker driver circuit at least partly through the magnetic plate. Other embodiments are also described and claimed.