Loudspeaker Diaphragm with Leaf Spring Suspension
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing loudspeakers often fail to achieve satisfactory sound pressure level power sensitivity, which is essential for efficient sound reproduction.
Innovation Solution
A loudspeaker design featuring a diaphragm with a fixed and movable portion connected by leaf springs, a coil over the movable portion, and a magnet assembly that generates a magnetic field to move the diaphragm when current flows through the coil, optimizing frequency response and sound pressure levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional loudspeaker designs are used, then structural simplicity is maintained, but sound pressure level power sensitivity is insufficient
Solution Approach 1:
The diaphragm is divided into a fixed portion and a movable portion, allowing independent optimization of each section. The movable portion can be driven by the coil while the fixed portion provides structural support, improving power sensitivity without compromising overall structural integrity.
Solution Approach 2:
The leaf springs provide dynamic suspension that allows the movable portion to respond efficiently to electromagnetic forces while maintaining mechanical stability. This dynamic design optimizes the transfer of electrical energy to acoustic output, improving power sensitivity.
2Power
If a diaphragm with fixed and movable portions is implemented, then sound pressure level power sensitivity is improved, but device complexity increases
Solution Approach 1:
The leaf springs serve multiple functions simultaneously: they suspend the movable portion, provide mechanical coupling between fixed and movable portions, and contribute to the overall structural rigidity. This merging of functions reduces the number of separate components needed while maintaining improved power sensitivity.
Solution Approach 2:
The magnet assembly serves dual purposes: it generates the magnetic field necessary for electromagnetic force generation and provides structural support for the coil assembly. This multi-functionality reduces overall device complexity while maintaining the improved power sensitivity achieved through the diaphragm design.
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 design enhances sound pressure level power sensitivity, resulting in improved sound reproduction efficiency and a near 'ideal' loudspeaker with wide directivity and smooth power response across the audio band.
Implementation Method 1
A coil is disposed over the diaphragm in the movable portion of the diaphragm. A magnet assembly is operatively disposed relative to the coil, wherein upon flow of current through the coil, the movable portion of the diaphragm moves relative to the fixed portion
Data Source
AI summary
A loudspeaker is disclosed. The loudspeaker includes a diaphragm with a fixed portion and a movable portion. The fixed portion is attached to the movable portion by a plurality of leaf springs. A coil is disposed over the diaphragm in the movable portion of the diaphragm. A magnet assembly is operatively disposed relative to the coil, wherein upon flow of current through the coil, the movable portion of the diaphragm moves relative to the fixed portion.