Loudspeaker Frame Aperture for Lead Wire Routing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing loudspeaker units face challenges in routing lead wires from a voice coil due to space constraints, particularly in vehicle cabins with severe space limitations, and the use of expensive dampers with lead wires is unreliable and costly, especially for high-drive power subwoofers.
Innovation Solution
A loudspeaker unit configuration featuring a frame with an aperture that communicates with the internal space, allowing easy routing and connection of lead wires to link terminals before attaching a duct, which covers the aperture, eliminating the need for expensive dampers with integrated lead wires.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a duct projects from the outer surface of the frame to control back pressure, then sound pressure in low frequency range is increased, but space for routing lead wires is insufficient
Solution Approach 1:
The frame is divided into multiple parts: a main frame body and a separate duct component. The duct is attached to the frame at a location that does not interfere with the internal space needed for lead wire routing. This segmentation allows the duct to project from the frame for back pressure control while maintaining adequate space within the frame for lead wire formation and connection.
2Ease of operation
If an expensive damper with integrated lead wires is used, then lead wire routing is simplified, but cost increases and reliability decreases for high drive power applications
Solution Approach 1:
The damper and lead wire system is segmented into separate components: a standard damper without integrated lead wires, and separate lead wires that are routed through the frame. This allows the use of a reliable, cost-effective standard damper while maintaining ease of lead wire installation by providing designated routing paths within the frame structure.
Solution Approach 2:
The frame acts as an intermediary structure that provides designated paths and spaces for lead wire routing. By incorporating lead wire routing channels and attachment points into the frame design, the system facilitates easy lead wire installation without requiring expensive integrated solutions, while maintaining proper wire management and connection reliability.
3Strength
If the frame is designed to fully cover the rear surface of the diaphragm, then structural support is improved, but space constraints in vehicle cabins are not adequately addressed
Solution Approach 1:
The frame structure is segmented to provide selective support: the main frame body provides structural support where needed, while the duct is designed as a separate attached component that extends from the frame. This segmentation allows the frame to maintain adequate structural support for the diaphragm while the overall compact design, with the duct projecting externally, accommodates severe space constraints in vehicle cabin installations.
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
Enables easy formation and connection of lead wires without special dampers, facilitating installation in constrained spaces and reducing costs while maintaining effective sound pressure in the low frequency range.
Implementation Method 1
a voice coil 102 disposed in the magnetic gap G, the voice coil 102 being driven by electromagnetic interaction when energized
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Disclosed is a loudspeaker unit (1) that includes a voice coil (4), a diaphragm (5), a damper (6), a frame (7) supporting an outer edge of the diaphragm and an outer edge of the damper, and a duct (2) projecting from an outer surface of the frame, air moved by vibration of the diaphragm flowing into and out of the loudspeaker unit through the duct. The frame has an aperture (12) that communicates with a space inside the frame. The duct, serving as a separate member, is attached to the frame so as to cover the aperture. The frame further includes a support tab (7c) that projects into the aperture. Link terminals (14) are attached to the support tab. Before the duct is attached to the frame, lead wires (17) extending from the voice coil are formed into a predetermined shape and are then connected to the link terminals in a space within the aperture.