Speaker Apparatus Frame Integration for Weight Reduction
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Solution Overview
Problem
Conventional speaker apparatuses are heavy and have a large profile due to the need for additional frames to support the magnetic circuit and voice coil unit, limiting thickness reduction and vibration efficiency.
Innovation Solution
A speaker apparatus design that secures the magnetic circuit using a supporting member on the bottom portion of the frame, eliminating the need for a separate front frame, allowing the voice coil unit and coupling member to be positioned closer to the magnetic gap, and using a joint member that moves within openings in the yoke and supporting member to enhance vibration range and reduce weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate front frame is added to support the magnetic circuit, then the magnetic circuit can be securely mounted, but the weight of the speaker apparatus increases
Solution Approach 1:
The patent merges the magnetic circuit support function into the existing frame structure. The frame is designed with an integrated magnetic circuit support portion that directly holds the magnetic circuit, eliminating the need for a separate front frame. This integration maintains secure mounting while reducing the total number of components and overall weight.
Solution Approach 2:
The frame is designed to serve multiple functions: it provides structural support for the diaphragm, houses the damping components, and includes an integrated magnetic circuit support portion. This multi-functionality eliminates the need for additional dedicated support structures, reducing weight while maintaining reliability.
2Power
If the voice coil unit is positioned inside the magnetic gap, then the magnetic field interaction is optimized, but the depth of the cone shaped space must be increased
Solution Approach 1:
The patent repositions the voice coil unit from a purely axial arrangement to a configuration where it extends radially outward from the magnetic gap. The diaphragm is coupled to this radially extending portion, allowing the voice coil unit to be positioned inside the magnetic gap for optimized magnetic field interaction while the radial extension provides the necessary coupling length without increasing the axial depth of the cone shaped space.
3Reliability
If the portion of the voice coil unit projecting outward from the magnetic gap is lengthened, then the diaphragm coupling is improved, but the thickness of the speaker apparatus increases
Solution Approach 1:
The voice coil unit is designed to extend radially outward from the magnetic gap rather than purely axially. This radial extension provides sufficient length for reliable diaphragm coupling while maintaining a compact axial profile, thus improving coupling reliability without increasing the overall thickness of the speaker apparatus.
4Reliability
If another frame is added to house the magnetic circuit, then the magnetic circuit can be securely supported, but the device complexity increases
Solution Approach 1:
The patent combines the magnetic circuit support function into the existing frame structure through an integrated magnetic circuit support portion. This eliminates the need for a separate front frame component, reducing the total number of parts and assembly steps while maintaining secure support for the magnetic circuit.
Solution Approach 2:
The frame is designed as a multi-functional component that simultaneously provides structural support for the diaphragm, houses damping components, and supports the magnetic circuit through its integrated support portion. This consolidation reduces device complexity by eliminating dedicated single-function components.
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 achieves weight reduction, thickness minimization, and improved vibration efficiency by eliminating the need for an additional frame and optimizing the positioning of the voice coil and diaphragm, while maintaining effective sound output.
Implementation Method 1
a magnetic circuit including a recessed first yoke 21 having a plate portion 211 and a circumferential wall portion 212 surrounding the plate portion 211; a magnet 22 disposed inside the first yoke 21; and a second yoke 23 disposed such that the second yoke 23 and the plate portion 211 of the first yoke 21 sandwich the magnet 22, and an annular magnetic gap Gp is formed between the second yoke 23 and the circumferential wall portion 212; a voice coil unit 31 disposed inside the magnetic gap Gp in the magnetic circuit
Data Source
AI summary
A light weight and low profile speaker apparatus is provided. In one embodiment, the speaker apparatus includes: a frame member; a magnetic circuit; a supporting member disposed on a bottom portion of the frame member for securing and supporting the magnetic circuit at an opposite circumferential end portion of a circumferential wall portion of a first yoke relative to a plate portion; a voice coil unit disposed inside a magnetic gap in the magnetic circuit; a coupling member disposed outward of the circumferential wall portion of the first yoke; and a diaphragm having an inner circumferential end portion coupled to the coupling member. The voice coil unit and the coupling member are joined by a joint member that extends in a direction transverse to the circumferential wall portion of the first yoke; and a space where the joint member joining the voice coil unit and the coupling member can move is formed in each of the circumferential wall portion of the first yoke and the supporting member.