Loudspeaker Frame with Radial Arms for Thin Profile and Cooling
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Solution Overview
Problem
Conventional loudspeakers with resin frames face challenges in achieving a thin profile due to complex shapes and structural weaknesses, making it difficult to manage sound pressure and maintain productivity and strength.
Innovation Solution
The design features a frame with a cylindrical internal space, a diaphragm connected via edges to the frame, and a magnetic circuit connected via arms to the frame, allowing for a thin profile without the need for sound pressure release openings, enhancing air-cooling and structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional loudspeakers use resin frames with complex shapes to manage sound pressure, then sound pressure control is improved, but manufacturing complexity and structural strength deteriorate
Solution Approach 1:
The magnetic circuit is segmented into multiple independent arms (first arm, second arm, third arm, fourth arm) that are radially arranged around the magnet. This segmentation allows sound pressure to be managed through the distributed arm structure rather than requiring complex frame shapes, simplifying the overall frame design while maintaining sound pressure control capability.
Solution Approach 2:
The patent transitions from managing sound pressure through complex 3D frame shapes to managing it through the radial arrangement of arms in a planar configuration. The arms extend radially outward from the central magnet, creating a star-like pattern that efficiently manages sound pressure in the radial dimension without requiring complex axial or circumferential frame features.
2Reliability
If conventional loudspeakers add openings for sound pressure release, then sound pressure management is improved, but structural strength and productivity deteriorate
Solution Approach 1:
The arms serving the magnetic circuit serve multiple functions: they provide magnetic circuit support, enable sound pressure release through their open structure, and maintain frame rigidity. This multi-functionality eliminates the need for separate sound pressure release openings that would compromise frame strength, as the arms themselves perform all three functions simultaneously.
3Length of moving object
If conventional loudspeakers use thin-profile designs, then compactness is improved, but cooling efficiency and structural integrity deteriorate
Solution Approach 1:
The arms are designed with built-in cooling channels or air passageways that are formed during manufacturing. This preliminary incorporation of cooling pathways ensures that air flow for cooling is pre-established within the arm structure, allowing efficient heat dissipation from the magnet and voice coil without requiring additional cooling components that would increase the loudspeaker's thickness.
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 configuration enables a loudspeaker with a simple frame shape, improved air-cooling, and increased strength, suitable for thin-profile applications such as in-car audio systems.
Implementation Method 1
The voice coil body includes a bobbin and a voice coil wound near a first end of the bobbin. The voice coil is located in the magnetic gap.
Implementation Method 2
The magnetic circuit includes a magnet and a bottom plate. The magnetic circuit is located in the internal space of the frame and has a magnetic gap.
Implementation Method 3
adjacent arms are separated by an opening. The sound pressure from the rear side of the diaphragm allows air to pass through the openings, thereby improving the effect of air-cooling magnetic circuit 61.
Data Source
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AI summary
A loudspeaker includes a frame, a diaphragm, an edge, a magnetic circuit, and a voice coil body. The magnetic circuit includes a magnet and a bottom plate. The bottom plate includes an installation part and a plurality of arms. The installation part is located on the first side of the magnet and is magnetically connected to the magnet. The arms project from the installation part toward the outer periphery and are connected to the frame.