Speaker Frame Fixing Lug for Enclosure Vibration Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing loudspeaker enclosures experience deformation and premature damage due to natural modes of vibration, particularly when the loudspeaker is mounted on a non-stiffened face, leading to acoustic degradation and mechanical stress.
Innovation Solution
A loudspeaker chassis with a fixing lug extending from the front face to the rear, attached to a second face of the enclosure, transfers rigidity from the second face to the first face, limiting deformation during operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the loudspeaker is mounted on a non-stiffened face of the enclosure, then assembly flexibility is improved, but the face deformation increases due to natural modes of vibration
Solution Approach 1:
The fixing lug extends from the first face (where the loudspeaker is mounted) to the second face (opposite face) of the enclosure, creating a three-dimensional structural reinforcement. This spatial extension allows the stiffening effect to propagate across the enclosure volume, connecting previously independent faces through a new dimensional pathway that redistributes vibrational stresses.
Solution Approach 2:
The enclosure is divided into distinct functional zones: the first face with loudspeaker mounting, the second opposite face providing rigid support, and the fixing lug acting as a structural connector. This segmentation allows each face to be optimized independently while maintaining overall structural integrity through the connecting lug.
2Stability of the object's composition
If ribs are added to stiffen the face, then face deformation is reduced, but manufacturing complexity increases due to demolding constraints
Solution Approach 1:
Instead of adding complex three-dimensional ribs to the first face that would interfere with demolding, the solution uses a fixing lug that extends in the depth direction (from first face to second face). This dimensional approach provides stiffening without creating undercuts or complex geometries that would complicate the demolding process.
Solution Approach 2:
The fixing lug acts as an intermediary structural element that transfers rigidity from the second face (which remains simple for demolding) to the first face (which requires stiffening). This mediator approach allows the first face to gain rigidity without directly modifying its geometry in a way that would complicate manufacturing.
3Device complexity
If the loudspeaker is mounted on the cover instead of the shell, then the shell structure is simplified, but the cover deformation increases due to cantilevered magnet mass
Solution Approach 1:
The fixing lug extends from the first face through the enclosure volume to the second face, creating a spatial framework that supports the cover-mounted loudspeaker. This three-dimensional support structure distributes the cantilevered magnet mass loads across multiple attachment points and structural elements, preventing localized cover deformation.
Solution Approach 2:
The stiffening function is extracted from the cover itself and relocated to the fixing lug structure that spans the entire enclosure. By separating the mounting function (on the cover) from the stiffening function (provided by the fixing lug connecting first and second faces), the cover can remain simple while still achieving overall structural rigidity.
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 reduces deformation of the first face by mechanically linking the vibration antinode to a fixed point, enhancing the enclosure's rigidity and preventing acoustic distortion and mechanical stress.
Implementation Method 1
The mounting bracket allows the rigidity of the second face of the speaker cabinet to be transferred via the speaker chassis to the first face of the speaker cabinet.
Implementation Method 2
The mounting bracket allows the rigidity of the second face of the speaker cabinet to be transferred via the speaker chassis to the first face of the speaker cabinet. Since the second face deforms very little along the axis of movement of the speaker cone, the deformation of the first face during speaker operation is thus significantly limited.
Data Source
Figure 1~3
Figure 4~5
Figure 6~8
AI summary
Chassis (24) for a loudspeaker (20), said loudspeaker (20) being able to be integrated into the box of an enclosure and also being able to comprise a mobile assembly comprising a membrane, the chassis (24) comprising a front face (28) arranged to be positioned at a first face of the box and in which an opening (36) is formed, defined by a periphery (37) to which the membrane can be secured so that the membrane is in acoustic communication with the exterior of the box via the opening, the chassis (24) further comprising a fixing lug (40) which extends from the front face of the chassis towards the rear of the chassis, and which is arranged to be fixed to a second face of the box.